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मराठी
Srpski језикM'malo ampikisano a zomangamanga zamakono ndi zolimba, mawonekedwe owoneka bwino ndi mawonekedwe a midadada ya konkriti sakhalanso osankha-ndizofunika zoyambira. Kumaliza kopanda chilema, kofanana kumatanthawuza ku mtengo wapamwamba wamsika, kutsika mtengo wa kukhazikitsa, komanso kukulitsa chikhulupiriro chamakasitomala. Ngwazi yosadziwika kumbuyo kwa kudumpha kumeneku ndikusinthika kwa nkhungu za konkriti. Zapita masiku a m'mphepete mwa mikwingwirima, mawonekedwe osagwirizana, komanso okwera mtengo pambuyo pokonza. Masiku ano, makulidwe opangidwa mwaluso kwambiri amatanthauziranso zomwe zingatheke, kuphatikiza sayansi yazitsulo ndi kulondola kwapang'onopang'ono kwa micron kuti apereke midadada yomwe imakwaniritsa miyezo yolimba kwambiri yomanga. Kwa zaka makumi awiri, tinaliMalingaliro a kampani Malingaliro a kampani Malingaliro a kampani Quangong Machinery Co., Ltd.tawona momwe chida choyenera cha nkhungu chimakhalira kusiyana pakati pa zotulutsa zapakati ndi zapamwamba, zokonzeka kugulitsa.
Koma ndi chiyani chomwe chimapangitsa nkhungu kukhala "yotsogola," ndipo imakweza bwanji mawonekedwe apamwamba? Bukuli limasiyanitsa mfundo za uinjiniya, zopanga zinthu zatsopano, komanso malingaliro apangidwe omwe amalekanitsa ma Concrete Block Molds ochita bwino kwambiri. Kaya mukufuna kuthetsa kubisala kwa pamwamba, kukwaniritsa magalasi ngati magalasi, kapena kutsimikizira kapangidwe kake kozungulira mamiliyoni ambiri, kumvetsetsa magawowa ndikofunikira. Fakitale yathu imaphatikiza malo opangira makina opangidwa ndi Germany ndi njira zochizira kutentha kwa eni ake kuti apange nkhungu zomwe sizimangowonjezera moyo wautumiki komanso kukweza malo a chipika chilichonse kukhala chofunikira kwambiri. Werengani kuti muwone momwe zida zolondola zimayankhira mwachindunji zovuta zowoneka bwino komanso zolimba zamakampani.
Ulendo wopita kumalo osawoneka bwino a konkriti umayamba ndi mawonekedwe a nkhungu omwe amatha kupitilira miyeso yoyambira. Ku Quangong Machinery Co., Ltd., gulu lathu laumisiri limagwiritsa ntchito nkhungu iliyonse ngati chida cholondola. ZapamwambaMitundu ya Concrete Block Moldsamadziŵika ndi zipilala zinayi zofunika kwambiri: kulondola kwa dimensional, kutsirizika kwa pamwamba, kulekerera kwa geometric, ndi zokutira zosavala. Izi zikakongoletsedwa, midadada ya konkire yotuluka imawonetsa kusiyana pang'ono, m'mbali zakuthwa, komanso mawonekedwe a nkhope omwe safuna kugaya kapena zokutira.
Pansipa pali tsatanetsatane wa magawo oyambira omwe fakitale yathu imaphatikiza munjira iliyonse ya nkhungu. Mafotokozedwewa amagwirizana mwachindunji ndi kuchotsedwa kwa zolakwika zomwe wamba monga zisa, ma burrs, ndi kuyamwa kwamitundu kosiyana.
| Gulu la Parameter | Mfundo Zapamwamba & Zokhudza Ubwino Wapamwamba |
| Mphuno Yamabowo Amphamvu (Ra) | ≤ 0.4 µm (ngati galasi lomaliza). Khomo losalala kwambirili limalepheretsa kumatira kwa konkriti, kuchepetsa ma pitting ang'onoang'ono ndikuwonetsetsa kuti pakhale malo onyezimira, osavuta kumasula pa block iliyonse. Zoumba zokhazikika nthawi zambiri zimakhala ndi Ra> 1.6 µm, zomwe zimatsogolera ku ma kukoka. |
| Kulekerera kwa Dimensional (mm) | ± 0.05 mm pamiyeso yonse yovuta. Kulekerera kolimba kumawonetsetsa kuti malo okwerera (nsapato, ma cores) amagwirizana bwino, kuteteza kung'anima kapena m'mphepete zomwe zimasokoneza kukongola kwa chipikacho komanso kuthekera kosunga. |
| Kulimba (HRC) | 58-62 HRC pambuyo pa chithandizo chakuya cha cryogenic. Kulimba kwambiri kumalimbana ndi zophatikizika kuti zisakanda makoma a zibowo, kuteteza kumalizidwa koyambira pamwamba pa mizere 100,000+. |
| Makulidwe a Chrome Layer (ngati kuli kotheka) | 20–25 µm chrome yolimba yokhala ndi ma micro-crack. Izi zimachepetsa kukangana pakugwetsa ndi 40%, kuchotsa mizere yogoletsa ndikupereka nkhope zosalala zosalala. |
| Vent Slot Geometry | Makina odulira laser okhala ndi mawonekedwe opindika (0.15mm-0.5mm). Kutulutsa mpweya koyenera kumatulutsa mpweya wotsekeka popanda kulola phala la simenti kuthawa, motero zimateteza kuti zibowo zibowole ndi zibowo za pamwamba. |
| Base Plate Flatness | ≤0.03 mm kudutsa mbale yonse. Kutsika kwathunthu kumapangitsa kuti pakhale kufalikira kofananako panthawi ya kugwedezeka, komwe kumayambitsa kuthetsa kugwada komanso kusafanana kwapamwamba. |
Magawo awa si manambala okhazikika; zimayimira chidziwitso chowonjezereka chomwe chapezedwa pakusanthula mamiliyoni a midadada yopangidwa mufakitale yathu ndi malo ogwirira ntchito limodzi. Mwachitsanzo, khwimbi la 0.4 µm limachokera ku kafukufuku wa tribology wosonyeza kuti pansi pa mfundoyi, kugundana kwapakati pa chitsulo cha nkhungu ndi konkire yowuma kumatsika kwambiri. Izi zikutanthauza kuti chipikacho chimatulutsidwa ndi kupsinjika pang'ono kwamakina, kusunga umphumphu wa microstructure pamwamba. Kuphatikiza apo, ma Concrete Block Molds athu amagwiritsa ntchito njira zochepetsera kupsinjika kwamagawo angapo asanapange makina omaliza kuti atsimikizire kuti ngakhale patadutsa masauzande ambiri akutenthetsa ndi kuziziritsa, zidazo zimasunga geometry yake yoyambirira. Wopanga chipika akamayika ndalama mu nkhungu zoyendetsedwa ndi parameter zotere, akugula chitsimikizo: chipika chilichonse chimawonetsa kulondola kwa nkhungu, kumapereka mawonekedwe apamwamba omwe amalankhula za ukatswiri ndi kulimba.
Kupitilira manambala, fakitale yathu imatsindika za traceability. Gulu lililonse la Concrete Block Molds limatsagana ndi lipoti la CMM (Coordinate Measuring Machine), kutsimikizira kuti khola lililonse limakwaniritsa zomwe zalonjezedwa. Kuwonekera uku kumatsimikizira makasitomala athu kuti kutha kwa midadada yawo sikudzawonongeka chifukwa cha kusagwirizana kwa zida. Pamapeto pake, magawo apamwamba amasintha nkhungu kuchokera pachidebe chokhazikika kukhala chida cholimbikitsira.
Zowonongeka zapamtunda monga ma pinholes, kufooka kwa m'mphepete, ndi mawonekedwe osagwirizana nthawi zambiri amanenedwa molakwika chifukwa cha kapangidwe ka konkire kokha. Komabe, m'zaka zathu makumi awiri zopanga mwapadera ku Quangong Machinery Co., Ltd., tazindikira kuti zomwe zimayambitsa nthawi zambiri zimakhala pakukonza nkhungu komweko. Micro-precision Machining-njira yomwe kugaya koyendetsedwa ndi makompyuta, EDM (Electrical Discharge Machining), ndi mphero yothamanga kwambiri imakwaniritsa kulondola kwa micron-kuchotsa mwachindunji chiyambi cha makina a zolakwika. Kusiyana pakati pa nkhungu yokhazikika ndi yotsogola kumawonekera pakukulitsa: yotsirizirayi ikuwonetsa ma radii osakanikirana bwino, mizere yolekanitsa yopanda ma burr, ndi ma angles opanda cholakwika.
Nawu mndandanda wokonzedwa wamomwe makina ang'onoang'ono olondola amawukira ndikuchepetsa zolakwika zinazake:
Kugulitsa kwathu m'malo opangira makina a 5-axis ndi makina ojambulira laser sikungokhudza kuthekera kwake, ndiko kubweretsa nkhungu yomwe imachita bwino kwambiri pakupanga zinthu. Makasitomala athu akamagwiritsira ntchito Concrete Block Molds opangidwa molunjika pang'ono, amawonetsa kuchepetsedwa kwa 70-80% pakukana kokhudzana ndi pamwamba. Uku sikungopulumutsa ntchito; imakweza mzere wonse wazinthu kukhala wapamwamba kwambiri. Kuphatikiza apo, makina olondola amachepetsa kufunika kochiritsa pambuyo pochiritsa ngati kugaya kapena kupenta, zomwe zimawonjezera mtengo ndipo zimatha kubisa zolakwika. M'malo mwake, micro-precision imasintha nkhungu kukhala chida chomwe chimasindikiza ungwiro nthawi zonse, kuzungulira pambuyo pa kuzungulira, kupangitsa kukongola kwapamwamba kukhala chibadwa m'malo mosintha.
Ku Quangong Machinery Co., Ltd., protocol yathu ya fakitale imalamula kuti nkhungu iliyonse iwunikiridwa payekhapayekha pogwiritsa ntchito makina oyezera osagwirizana. Izi zimatsimikizira kuti ngakhale ma geometri ovuta kwambiri amakwaniritsa mulingo wolondola kwambiri. Chotsatira chake ndi chakuti makasitomala athu akhoza kugulitsa midadada molimba mtima ndi chitsimikizo chakuti khalidwe lapamwamba lidzakwaniritsa ziyembekezo zazikulu za omanga nyumba ndi makontrakitala mofanana.
Kuthekera kwa nkhungu kotsogola kusunga mawonekedwe a pamwamba pa mizere mazana masauzande kumatengera mgwirizano pakati pa zinthu zoyambira ndi kutentha. Ngakhale malo opangidwa bwino kwambiri amawonongeka mofulumira ngati chitsulo sichingathe kupirira malo otsekemera ndi owononga a kupanga konkire. Kupyolera mu kuyesa mozama komanso zenizeni zapadziko lonse lapansi, Quangong Machinery Co., Ltd. yatsimikizira kuti zinthu zomwe zili mu Concrete Block Molds ndizitsulo za carbon, high-chromium monga D2, X155CrVMo12-1, kapena zitsulo zopangira ufa zogwiritsira ntchito kwambiri. Komabe, chitsulo chaiwisi ndi poyambira chabe. Kusinthaku kumachitika kudzera mu protocol yoyendetsedwa bwino yochizira kutentha yomwe imakulitsa kuuma, kukhazikika kwa mawonekedwe, ndi kukana kuvala popanda kuyambitsa brittleness kapena micro-fractures.
Pansipa pali mndandanda wamomwe njira zathu zochiritsira zakuthupi ndi kutentha zimathandizira kukhazikika kwapamwamba:
M'chidziwitso chathu, mtengo wazinthu zotsika umawonekera osati kulephera kwa nkhungu msanga komanso kuchepa kwapang'onopang'ono kwa khalidwe lapamwamba la chipika lomwe silidziwika mpaka gulu lalikulu likanidwa. Ku Quangong Machinery Co., Ltd., timalimbikitsa njira yosinthira moyo. Kuyika ndalama muzinthu zapamwamba komanso chithandizo cha kutentha kwenikweni kungakhale ndi mtengo wapamwamba kwambiri, koma kumapereka mtengo wotsikirapo pa chipika chilichonse ndikusunga malo apamwamba kuyambira chipika choyamba mpaka chomaliza. Labu yachitsulo ya fakitale yathu nthawi zambiri imayesa kulephera kwa nkhungu zakale kuti iyeretse ma protocol athu, kuwonetsetsa kuti m'badwo watsopano uliwonse wa Concrete Block Molds umapereka mawonekedwe ovala bwino komanso kuteteza pamwamba. Kwa wopanga chipika, izi zimatanthawuza kudalirika, njira yobwerezabwereza pomwe mawonekedwe apamwamba samasokonezedwa ndi kuwonongeka kwa zida.
Ngakhale ndi makina abwino kwambiri komanso makina olondola, mpweya wotsekeka komanso kugwetsa kosayenera kumatha kuwononga malo a konkriti. Ichi ndichifukwa chake ma Concrete Block Molds otsogola amaphatikizira makina otsogola otsogola omwe nthawi zambiri sawoneka ndi maso osaphunzitsidwa koma amakhudza kwambiri chinthu chomaliza. Zikhungu zachikhalidwe zimadalira mipata yosavuta kapena mabowo obowola polowera mpweya, zomwe zimatsekeka mosavuta kapena kulola phala la simenti kuthawa, ndikupanga "zipsepse" m'mphepete mwa chipika. Mosiyana ndi izi, zida zamakono zotulutsa mpweya zimapangidwira kuti zizitha kutulutsa mpweya ndikusunga phala. Mofananamo, makina oboola - njira zomwe zimatulutsira chipikacho - ziyenera kugwiritsira ntchito mphamvu zofanana popanda kuwononga malo osalimba.
Fakitale yathu, Quangong Machinery Co., Ltd., yapanga zida zingapo zamapangidwe zomwe zimayang'ana makamaka zilema zapamtunda zokhudzana ndi kutsekeka kwa mpweya komanso kupsinjika kwa m'zigawo. Pansipa pali mndandanda wazinthu zatsopanozi:
Zopangapanga izi ndikumapeto kwa zaka za mgwirizano pakati pa akatswiri opanga mafakitale athu ndi opanga ma block omwe akukumana ndi zovuta zopanga zenizeni padziko lapansi. Mwachitsanzo, m'modzi mwamakasitomala athu omwe amapanga zopindika zopindika anali kukana 5% chifukwa cha zibowo zowoneka bwino. Titasinthira ku ma Concrete Block Moulds athu okhathamiritsa, mitengo yokana idatsikira pansi pa 0.5%, ndipo kufunikira kwa zokutira kosiyana kunathetsedwa. Zotsatira zotere zimatsimikizira kuti kutulutsa mpweya ndi kugwetsa sizinthu zongoganizira chabe, koma ndizofunikira kwambiri pamachitidwe apamwamba.
Ku Quangong Machinery Co., Ltd., timaperekanso masinthidwe olowera mpweya makonda kutengera kapangidwe kake kasakaniza ndi geometry yotchinga. Mwachitsanzo, zosakaniza za mchenga wambiri zimafuna mpweya wokwanira kuti phala isatayike, pomwe zosakaniza zophatikizika zimafunikira mpweya wokwanira kuti mutulutse mpweya wokulirapo. Pogwiritsa ntchito makinawa, timaonetsetsa kuti kasitomala aliyense akukwaniritsa bwino pakati pa kuchotsa mpweya ndi kusunga zinthu, zomwe zimapangitsa kuti midadada iwonetse malo opanda cholakwika kuchokera pamakina.
Kulumikizana pakati pa Concrete Block Molds zapamwamba ndi mawonekedwe apamwamba kwambiri sikungatsutsidwe. Ndi ubale womwe umamangidwa pakulondola kwauinjiniya, kuchita bwino kwazitsulo, komanso kapangidwe kanzeru. Monga momwe tawonera, magawo monga sub-0.4 µm cavity finish, micro-precision Machining yomwe imachotsa zolakwika, zitsulo zotenthedwa ndi kutentha zomwe zimakana kuvala, ndi makina opanga mpweya wabwino amagwira ntchito pamodzi kuti apange midadada yomwe siimangokhala yomveka bwino koma yosaoneka bwino. Kwa opanga omwe akufuna kusiyanitsa malonda awo pamsika wodzaza anthu, nkhungu ndiyo ndalama zomwe zimakhudzidwa kwambiri. Ndiko kusiyana pakati pa midadada yomwe imafuna kukhudza nthawi zonse ndi yomwe imalamula mitengo yamtengo wapatali chifukwa cha ungwiro wawo wakunja.
Ku Quangong Machinery Co., Ltd., kudzipereka kwathu kumapitilira kupereka zida; timapereka mgwirizano womwe umatsimikizira kuti zopangira zanu zimatulutsa zinthu zapamwamba kwambiri, zokonzeka kumsika. Ndi zaka makumi awiri zaukadaulo, fakitale yathu yakonzanso luso lopanga nkhungu kukhala sayansi, ndikuphatikiza mayankho ochokera kuzinthu masauzande ambiri padziko lonse lapansi. Tikukupemphani kuti musamangoganizira za mtengo womwe wangotsala pang'ono kuonongeka, komanso mtengo wake wanthawi yayitali: zinyalala zocheperako, kuchulukirachulukira, kutchuka kwamtundu, komanso makasitomala okhutitsidwa. Kwezani mtundu wanu wa konkriti kufika pamlingo wotsatira ndi nkhungu zopangidwa kuti zizichita bwino. Lumikizanani ndi gulu lathu lero kuti mukambirane zomwe mukufuna ndikuwona kusiyana komwe kumapangitsa uinjiniya wolondola.
Kukula kwapang'onopang'ono kwa nkhungu, kuyeza mu Ra (micrometers), kumasamutsidwa mwachindunji ku chipika cha konkire panthawi yophatikizika. Ngati nkhunguyo ili ndi pamwamba (Ra> 1.6 µm), konkire imatsatira nsonga zazing'ono ndi zigwa, zomwe zimapangitsa kuti pakhale chipika chokhala ndi gritty, mapeto osagwirizana, kuwonjezereka kwa porosity, ndi zizindikiro zowoneka zokoka pakugwetsa. Advanced Concrete Block Molds kuchokera ku Quangong Machinery Co., Ltd. imafika kumapeto ngati galasi la ≤0.4 µm Ra, yomwe imachepetsa kukangana ndi kumamatira, kulola kuti chipikacho chituluke ndi malo osalala, owundana, komanso ofanana kwambiri omwe nthawi zambiri safuna kusindikiza kapena zokutira. Kusalala uku kumapangitsanso kukana kwa chipikacho kuti zisadetse komanso kumapangitsa kukhala kosavuta kuyeretsa, chinthu chofunikira kwambiri pazomangamanga.
Inde, mwamtheradi. Chimodzi mwazabwino zazikulu zamakina a Concrete Block Molds opangidwa mwaluso kwambiri ndikupanga mawonekedwe a "as-cast" omwe amakwaniritsa zokongoletsa kwambiri popanda kukonzanso kwachiwiri. Nthawi zambiri nkhungu zimapanga midadada yokhala ndi mizere yonyezimira, mawonekedwe osafanana, ndi mabowo opumira omwe amafunikira kugaya, kupukuta mchenga, kapena kugwiritsa ntchito chotchinga pamwamba. Zoumba zapamwamba zimakhala ndi makina olondola kwambiri, mpweya wabwino, ndi ngodya zofananira kuti athetse zolakwikazi pagwero. Mwachitsanzo, kugwiritsa ntchito kwa fakitale yathu zolowera zodulira laser kumalepheretsa kuphulika, pomwe magalasi omalizidwa amachotsa mizere yokoka. Makasitomala athu ambiri athetseratu njira zogayira pambuyo popanga, kuchepetsa ndalama zogwirira ntchito komanso nthawi yozungulira pomwe akuwongolera kukhulupirika kwa chipikacho popewa kufowoka komwe kumachitika chifukwa chakupera.
Kutalika kwa kutha kwa pamwamba kumadalira zinthu za nkhungu, chithandizo cha kutentha, ndi kuphulika kwa kusakaniza konkire. Ku Quangong Machinery Co., Ltd., Ma Molds athu a Concrete Block opangidwa kuchokera ku chitsulo chapamwamba kwambiri cha chromium (mwachitsanzo, D2 kapena chofanana) ndipo amachizidwa ndi kutentha kwambiri kwa cryogenic nthawi zonse amasunga mawonekedwe awo apamwamba a 150,000 mpaka 300,000 akagwiritsidwa ntchito ndi zosakaniza zokhazikika. Pazosakaniza zowononga kwambiri (monga zokhala ndi granite zophwanyidwa kapena zophatikizanso), nkhungu zomwezo zimatha kusunga upangiri wapamwamba wa pamwamba kwa 100,000+ mavalidwe aliwonse oyezeka asanawoneke. Zovala zosafunikira ngati chrome yolimba kapena PVD (Physical Vapor Deposition) imatha kukulitsa izi mpaka kupitilira mizungu 500,000. Kusamalira nthawi zonse, monga kuyeretsa malo olowera ndi mafuta osuntha, kumakulitsa luso la nkhungu kupanga zotchinga zopanda chilema.
Kutulutsa mpweya ndikofunikira kuti muchotse zibowo ndi zobowola, zomwe zimachitika chifukwa cha mpweya womwe umatsekeka pakati pa nkhungu ndi kusakanikirana kwa konkire panthawi ya kugwedezeka kwakukulu. Ma Molds a Advanced Concrete Block Molds amaphatikiza mpweya woyikidwa bwino, wodulidwa ndi laser womwe umalola mpweya wotsekekawu kuthawa osalola phala la simenti kutulutsa. Mpweya wozungulira wanthawi zonse kapena mipata yosayikidwa bwino nthawi zambiri imatseka kapena kuloleza kutulutsa, zomwe zimatsogolera ku "zipsepse" pa midadada ndikutuluka mosagwirizana pakapita nthawi. Dongosolo lotulutsa mpweya la fakitale yathu limagwiritsa ntchito mipata yopyapyala ngati 0.15 mm pamphepete, kukulitsa mpaka 0.5 mm kumbuyo, kupanga njira yanjira imodzi ya mpweya. Kapangidwe kameneka kamapangitsa kuti mpweya utuluke kwathunthu panthawi ya compaction, zomwe zimapangitsa kuti pakhale malo owundana, opanda mapini. Kutulutsa mpweya koyenera kumathandizanso kuti mtundu ukhale wofanana chifukwa palibe kusiyanasiyana komwe kumachitika chifukwa cha matumba a mpweya.
Machitidwe owonongera amakhudza mwachindunji kukhulupirika komaliza pamwamba poyang'anira momwe chipikacho chimachotsedwa patsekeke. Mu nkhungu zapamwamba ngati za Quangong Machinery Co., Ltd., kugwetsa kumatheka kudzera pakuphatikizika kwa zikhomo zojambulira zolondola, ukadaulo wothandizira mpweya, ndi ma angles osungidwa bwino. Ziumba zokhazikika nthawi zambiri zimagwiritsa ntchito zikhomo zolimba zotulutsa zomwe zimatha kusiya zozungulira kapena kuyambitsa mphamvu zochotsa m'zigawo zosiyanasiyana, zomwe zimapangitsa kuti pakhale zingwe m'mbali mwa block. Njira yathu imaphatikizira kugwiritsa ntchito zikhomo za ejector zokhala ndi nsonga za polima zomwe zimagawa mphamvu pang'onopang'ono, kuphatikiza njira zazing'ono zazing'ono zomwe zimabaya mpweya wochepa kwambiri kuti uthyole chisindikizo cha vacuum musanayambe kutulutsa makina. Izi zimachepetsa kukangana mpaka kufupi ndi ziro, kuwonetsetsa kuti midadada yokhala ndi mawonekedwe ocholowana kapena zowala kwambiri zimachotsedwa popanda kuphulika kulikonse. Chotsatira chake ndi chipika chomwe chimatuluka mu nkhungu ndi mawonekedwe ake apamwamba osasunthika.
Musalole zida zakale kuti zichepetse kuthekera kwazinthu zomwe mumagulitsa. Gwirizanani ndi Zenith kuti mupeze ma Concrete Block Molds opangidwa kuti azichita bwino kwambiri. Kaya mukufuna ma cavities, zokutira zapadera, kapena ma seti athunthu a nkhungu kuti apange mizere yothamanga kwambiri, ukatswiri wa fakitale yathu umatsimikizira kuti mumakwaniritsa zomaliza komanso zolimba. Lumikizanani ndi gulu lathu laukadaulo lero kuti mukambirane, ndipo tikuthandizeni kupanga midadada yomwe imadziwika bwino chifukwa cha mawonekedwe awo opanda chilema komanso kusanja kwawo. Kwezani kupanga kwanu—sankhani kulondola, sankhani kudalirika, sankhaniMalingaliro a kampani Malingaliro a kampani Malingaliro a kampani Quangong Machinery Co., Ltd.