China Steel Silo

China steel silo ndi nyumba yosungiramo zitsulo zachitsulo zomwe zinapangidwira kuti zisungidwe ufa wambiri kapena ma granules, zokonzedwa-zowongolera zotayira komanso malo okonzeka kuti asamuke ndi kusamalidwa fumbi; kwa ogula, kugula silo yachitsulo ku China si "chinthu chimodzi"-kuchuluka, makulidwe, ndi zolemba zimayendera limodzi ngati phukusi lovomerezeka. Ndi malire olamuliridwa a zinthu zolimba zambiri: kapangidwe kazitsulo zazitsulo, malo otayira omwe amapangitsa kuti nkhokwe ikhale yodziwikiratu, ndi malo olumikizirana omwe amasunga fumbi ndi zotayika. Ngati zina mwa izi sizikuchulukira-zosungirako, silo yosungira imakhala vuto lokonza m'malo mwa buffer yopanga. M'ma RFQ ambiri a projekiti, malire otulutsira ndi kutulutsa amatanthauzidwa patsogolo, kuphatikiza kusonkhanitsa fumbi, kutulutsa mpweya, ndi njira yosamutsira kunsi kwa mtsinje.

Tsamba ili la China steel silo limamangidwa mozungulira magulu anayi kuti ogula athe kutseka mwachangu:

• Kalozera wa Steel Silo wokhala ndi mabanja atatu ofunikira omanga ndi zinthu zina-zosiyanasiyana
• Silo Supporting Equipment Directory yomwe imatembenuza silo ya Zitsulo kukhala mzere wathunthu wosungira nkhokwe
• Liquid Tank Directory yama projekiti omwe amaphatikiza zolimba ndi zamadzimadzi zofunikira
• Chidule cha System Scenarios ndi mapulogalamu khumi omwe amatchulidwa kuti apange mapu mwachangu

 

 

 

Silo yachitsulo iyenera kutchulidwa ndi ntchito poyamba, kenako ndi fomu. M'machitidwe, kusankha Silo Silo kumayamba ndi machitidwe akuthupi ndikutha ndi mndandanda woyeserera. Pakugula, tanthauzo la "ntchito" limalepheretsa kusintha kwadongosolo pambuyo pake: machitidwe azinthu, mayendedwe oyembekezeredwa, njira yotulutsira, ndi zovuta zachilengedwe. Ku China steel silo RFQ, zolowetsazi ziyenera kulembedwa ngati njira zovomerezeka, osati kufotokozera zamalonda. Zolowetsazo zikamveka bwino, mtundu wa silo wosungira umakhala kusankha koyenera, ndipo kuchuluka kwa Silo silo kumatha kuyimitsidwa ndi mfundo zovomerezeka zoyezeka.

 

Envulopu Yaumisiri Yogwiritsidwa Ntchito Polemba

Pazinthu zambiri zotumiza kunja, envulopu yathu yokhazikika yaku China zitsulo zopanga silo imakwirira:

• Gulu lodziwika bwino:100–20,000 m³pa malo osungira silo dongosolo lonse
• Bandi yodziwika bwino:Ø3–35 mkwa zipolopolo zachitsulo za silo
• Mitundu yantchito: kusungirako nkhokwe, -kutengera nkhokwe ya tsiku ndi tsiku, kapena{1}kusunga{1}nthawi yayitali

 

 

Mitundu Yomanga

 

Spiral Steel Silo

Spiral Steel Silo nthawi zambiri imasankhidwa kuti ikhale yobwerezabwereza komanso kuyimitsa bwino pamasilo -yadi ambiri. Kwa mapulojekiti aku China azitsulo zonyamula simenti, phulusa la ntchentche, ndi ufa wamchere, Spiral Steel Silo imathandizira kusungirako silo kosindikizidwa pamene malowedwe a denga ndi malo olowera amafotokozedwa koyambirira. Spiral Steel Silo nthawi zambiri imasankhidwa mwiniwakeyo akafuna chopondapo chachitsulo chosasinthika chazitsulo pamagawo angapo.

Kuwongolera kuvomereza ogula angatsimikizire:

• Ma geometry a zipolopolo ndi ma alignment target omwe amateteza denga -up and discharge centerline
• Tsatanetsatane wotsekera padenga pozungulira maenje ndi zida zotsekera kuti asatayike
• Discharge-tanthauzo la zone: cone angle, aeration zoning, and anti-bridging interface list
• Kulemba zilembo ndi kulongedza mndandanda wamapu kuti mulandire mwachangu ku China steel silo lot

 

 

Bolted Steel Plate Silo

Silo yachitsulo yokhala ndi bolts imayenera kutumiza modula komanso kuwongolera malo. Ku China ntchito ya silo yachitsulo, kubolita kumachepetsa-kuchuluka kwa ntchito ndipo kumapangitsa kupenda kumveketsa bwino pogwiritsa ntchito mapu a bawuti, kusankha gasket, ndi kuwongolera torque. Njirayi ndi yofala pamapulojekiti otumiza kunja komwe mapanelo amayenda m'mitsuko ndipo amamangidwa motsatizana. Ndizofalanso kuti silo yosungiramo tirigu pamene ma aeration ndi njira zolowera zimatchulidwira palimodzi.

Kuwongolera kuvomereza ogula angatsimikizire:

• Dongosolo la kulolerana kwa gulu, kuyanjanitsa mabowo, mndandanda wa bolt, ndi ma torque
• Kusindikiza kwa chisindikizo ndi gasket kumafanana ndi kusinthasintha kwa kutentha ndi chinyezi
• Mndandanda wamawonekedwe owumitsidwa pa RFQ: zolowera, zosefera, makwerero ofikira, nsanja, ndi zida zamalingo
• Kutsekedwa kwanyengo mozungulira denga-ku{1}}malo olumikizirana zipolopolo omwe nthawi zambiri amakhala fumbi lotayirira m'mayadi osungiramo ma silo

 

 

Welded Steel Silo

Silo yachitsulo yowotcherera imasankhidwa pamene kuuma, geometry yokhazikika, kapena kuzungulira kwa ntchito yayikulu kumalamulira. Ku China zitsulo zogulira silo, kukula kowotcherera kuyenera kuphatikizidwa ndi umboni wowunika ndi pulani yakuphimba, chifukwa moyo wozungulira umatanthauzidwa ndi kukhulupirika kwa weld ndi chitetezo chapamwamba monga makulidwe. Silo yachitsulo yomangika imatchulidwa nthawi zambiri pamene ntchitoyo idutsa malire a kutopa, kukhathamiritsa, kapena kusiyana kwakukulu kwa kutentha-.

Kuwongolera kuvomereza ogula angatsimikizire:

• Njira yowotcherera ndi kuwunika kogwirizana ndi polojekiti ya ITP
• Kuwongolera kosokoneza kuti muteteze mawonekedwe a nozzle ndikutulutsa geometry
• Zolemba zokutira ndi kukonza njira zoyendera ndi kuyimitsidwa
• Mapu a weld ndi malipoti owerengeka kuti silo yachitsulo yaku China itulutsidwe popanda-kuwunikanso

 

 

Material-zitsulo zenizeni

 

Makhalidwe azinthu amasintha tanthauzo la "kusungirako bwino nkhokwe". Chikwatu cha silo yaku China chikuyenera kulekanitsa mitundu iyi kotero kuti dongosolo losungirako silo limatengera kulephera, osati kuchuluka kokha.

 

 

Insulated Steel Silo

Silo yachitsulo yotsekeredwa imayang'ana kuwongolera kwa condensation ndi kukhazikika kwa kutentha. Ku China pulojekiti ya silo yachitsulo ya ufa wa hygroscopic, kutchinjiriza kumachepetsa chiwopsezo cha makeke ndikuteteza kukhazikika kwa kutulutsa kosungirako nthawi zonse.

 

 

Grain Steel Silo

Silo yosungiramo tirigu imapangidwa mozungulira kusungirako ndikusamalira bwino. Pantchito yambewu ya silo ya ku China, kukula kwa silo kosungirako kuyenera kuphatikizira kukonzeka kwa mpweya, zomangira mpweya-zolowera mpweya, ndi madoko owunika kuti silo yachitsulo izitha kusungira{2}}nthawi yayitali popanda kutayika bwino.

Zothandizira za RFQ za silo yosungira mbewu:

• Mtundu wa mapira, mtundu wa chinyezi, nthawi yosungiramo zomwe mukufuna, komanso kuchuluka kwa zomwe zimagulitsidwa
• Zoyembekeza za mpweya ndi mpweya komanso kutsata malamulo amderalo
• Njira yochotsera ndi zofunikira zoyeretsera

 

 

Silo ya Simenti

Silo yosungiramo silo ndi fumbi-poyamba. Silo yachitsulo iyenera kukhala yosindikizidwa pakudzaza ndi kutsitsa, ndipo malo otulutsira ayenera kukana kutsetsereka. Ku China zitsulo zogulira silo, phatikizani mawonekedwe otolera fumbi ndi njira yothandizira kuyenda kotero kuti silo yosungiramo imatha kukumana ndi zotuluka popanda kukonzanso mwadzidzidzi.

 

Mineral Powder Steel Silo

Kusungirako silo ya mineral powder kumakhudzidwa ndi chinyezi komanso kuphatikizika. Tchulani ma hopper geometry, mawonekedwe a aeration, ndi malire a fumbi kuti silo ya Steel ipereke kutulutsa kokhazikika ndikuchepetsa kusamalidwa m'nyumba pamalo osungiramo zinthu.

 

Biomass Pellet ndi Wood Chip Steel Silos

Kusungirako ma silo a biomass kuyenera kuyang'anira kuphulika kwa fumbi komanso kuyenda kwamadzi. Ku China zitsulo zotsalira za silo biomass duty, tanthauzirani malo odzipatula komanso kuwongolera fumbi pamalo osinthira kuti nkhokwe yosungiramo ikhale yotetezeka komanso yaukhondo.

 

 

Sulfur Steel Silos

Ntchito ya silo yosungiramo sulfure imatsindika kusindikiza, kuwononga dzimbiri, ndi malire a mpweya wabwino. China zitsulo silo kwa sulfure ayenera loko kutentha osiyanasiyana ndi fumbi kulamulira kukula msanga.

 

 

Urea Steel Silos

Kusungidwa kwa silo ya urea kumayendetsedwa ndi chiwopsezo cha hygroscopic caking. Dongosolo la silo lachitsulo la China liyenera kufotokozera njira yoyendetsera chinyezi, njira zopangira mizere ngati zikufunika, ndi thandizo lotulutsa kuti silo yachitsulo isatseke potsitsa.

 

 

Melamine Steel Silos

Ntchito ya silo yosungiramo Melamine imafuna kuwongolera kuipitsidwa komanso kugwira ntchito modalirika kwafumbi. Tchulani kudzazidwa kosindikizidwa, kutulutsa, ndi kuyeretsa kuti silo yachitsulo itulutsidwe mwachangu polandira ndikusunga nkhokwe yokhazikika.

 

 

Alumina Steel Silos

Alumina silo yosungirako imayang'ana kwambiri kuvala, kunyamula fumbi, komanso kuteteza chinyezi. Phukusi la China steel silo nthawi zambiri limaphatikiza magawo angapo a Zitsulo za silo ndi kuwongolera fumbi ndi kutumiza, kotero mapu a mawonekedwe amalepheretsa kutumiza kuchedwa pagulu lazosungirako.

 

 

Prebaked Anode ndi Calcined Coke Steel Silos

Kusungirako calcined coke silo ndikopweteka komanso kwafumbi. Tchulani chitetezo cha mavalidwe pamalo okhudzidwa ndikutanthauzira mawonekedwe a dedusting kotero kuti kutulutsa kwa Silo yachitsulo kumakhalabe kokhazikika komanso kutayika kwa silo kumayendetsedwa.

 

 

Steel Silo Roof

Denga la Steel silo limanyamula mpweya, zosefera, ndi mwayi. Ku China kugula silo yazitsulo, kumatanthawuza malowedwe a denga, polowera mpweya, ndi njira zotetezedwa kuti silo yosungiramo ivomerezedwe popanda{1}}kukonzanso malo.

 

 

Matrix osankha ogula

 

Silo yachitsulo ya China ndiyodalirika monga momwe amalumikizirana. Zipangizo zothandizira zimasintha nkhokwe ya Zitsulo kukhala chingwe chonse chosungiramo nkhokwe kuti isalandire mpaka kutuluka-. Kugula kuyenera kutenga gawo lililonse ngati phukusi lolumikizira lomwe lili ndi malo ovomerezeka ovomerezeka. Kuchuluka kwa silo yosungirako sikukwanira popanda kutanthauzira fumbi, kudzipatula, ndi kusamutsa, makamaka pamene silo yachitsulo ya China imapangidwira kupanga mosalekeza.

 

Kulandila ndi kutsitsa ma module

 

Zida Zopangira Zambiri

 

Bulk Processing Equipment imalumikiza magalimoto kapena ma hopper ndi mawonekedwe azitsulo a Silo.

• Zinthu zaufa zodzaza F mndandanda, zoyenera ufa wabwinoZocheperapo kapena zofanana ndi 0.5 mm
• Granular zakuthupi zodzaza K mndandanda, zoyenera0-30 mmzipangizo

Polandira silo yachitsulo yaku China, cholinga chovomera ndikudzaza kosindikizidwa: kuwongolera fumbi, kutsitsa kokhazikika, komanso kutayikira koyendetsedwa kotero kuti bwalo losungiramo nkhokwe likhale loyera.

 

Dedusting ndi emission control

 

 

Silo Fumbi Wotolera

 

Wotolera fumbi amakhazikitsa mpweya wabwino wa silo ndikuteteza bwalo lachitsulo cha China. Kufotokozera fumbi kutentha ndi chinyezi kupewa khungu fyuluta, ndi kutsimikizira kugwirizana flange ndi kupeza kukonza padenga. Kuwongolera fumbi nthawi zambiri ndiko kupambana kosavuta kowoneka bwino pakusunga m'nyumba ndi kutsata.

Kutumiza ndi kukwera

 

 

Mining Belt Conveyor

 

Lamba wonyamulira amathandizira-mtunda wautali, kusamutsa mosalekeza pakati pa silo ndi kugwiritsa ntchito kunsi kwa mtsinje. Njira yotsekera imachepetsa fumbi lozungulira malo osungiramo nkhokwe ndipo imathandizira kugwira ntchito motetezeka ku China steel silo yard.

 

Silo Bucket Elevator

 

Chokwezera chidebe chimathandizira kukweza koyimirira kupita ku chakudya chapamwamba. Ndizofala m'mizere ya silo yosungiramo tirigu komanso m'masanjidwe a mineral powder silo. Tanthauzirani kutalika kokweza, kuchuluka kwake, ndi kusindikiza fumbi kuti pamwamba pakhale paukhondo.

 

Air Chute

 

An Air Chute fluidizes ufa kuti usamutsire pazovuta zochepa. Mafotokozedwe ena amaphatikizapo0.03–0.05 MPampweya woponderezedwa, kutulutsa fumbi<5 mg/m³, ndi kupereka mphamvu mpakapafupifupi 200 t/hm'lifupi mwake mozungulira400 mm, yokhala ndi ma angles oyika nthawi zambiri kuzungulira4-10 digiri. Ku China steel silo line, Air Chute imasankhidwa kuti iperekedwe mofatsa komwe kumachepetsa kuvala ndikusunga nkhokwe yotsekedwa.

 

Thandizo loyenda ndikuwongolera kutulutsa

 

Zida Zokwera Mtengo

 

Zida za inflation zimathandizira kukhazikika kwa kutulutsa pansi. Zina zomwe zimaphatikizirapo ma plates a gasification, blower, control system, ndi ring{1}}kugawa mapaipi. Masanjidwe amaphatikizanso kukakamiza0.03–0.1 MPa, gasification mbale permeability1–2 m³/m²·m, ndi kuthamanga kwa mzere wa nthambi mpaka0.6 MPa. Ku China zitsulo zopangira ufa wa silo, izi nthawi zambiri zimakhala chinsinsi cha kutulutsa kokhazikika kwa silo.

 

Mavavu a Makampani Opangira Zomangamanga

 

Mavavu amatanthauzira kudzipatula ndikuwongolera mozungulira silo yosungira. Tanthauzirani mtundu wa valavu, kalasi yovala, ndi mwayi wokonza kuti mzere wazitsulo waku China uzitha kuyenda popanda kuzimitsa pafupipafupi. Kudzipatula koyenera kumachepetsa kutayikira kosakonzekera komanso kutayika kwa zinthu munkhokwe.

 

Pneumatic transfer

 

Silo Pampu

 

Silo Pump imathandizira-kutengerapo gawo kupita kumalo akutali. Zizindikiro zodziwika bwino zimaphatikizira kukakamiza kwa ntchito0.3-0.6 MPa, kutengera mtunda mpakapafupifupi 1500 m, zotsatira50–200 t/hpampope iliyonse kutengera zinthu, komanso kulimba-ku{1}}kuchuluka kwa gasi kuzungulira30:1. Wear-zovala za ceramic zosagwira ntchito zimagwiritsidwa ntchito ngati abrasive duty. M'mapulojekiti a Silo a Silo, Pump ya Silo imasankhidwa ngati kusamutsa kosindikizidwa kumateteza ukhondo wosungirako nkhokwe ndi{3}}kuyendetsa mtunda wautali.

 

Kupaka ndi kutumiza

 

Makina Odzaza Thumba la Ton

 

Ton bagging amasintha nkhokwe zosungiramo zinthu zakale kukhala dispatch{0}}zokonzeka. Mafotokozedwe ena amaphatikizapo0.5–2 tmatumba,20-40 matumba / orapa 1 t/chikwama, kuyeza kulondola mozungulira±0.2%, kutulutsa fumbi<5 mg/m³ndi kuchotsa fumbi lotsekera, kuphulika kosatha-kukonza kotsimikiziraEx d IIB T4, kusankha RFID/labeling, ndi kukhudzana mbali304 chitsulo chosapanga dzimbirikwa kugwira bwino. Kwa ntchito zotumiza kunja kwa silo ku China, gawoli limafotokoza momwe kusungirako silo kumakhalira kutumiza kogulitsa.

 

 

Ma projekiti ambiri aku China zitsulo zopangira silo amaphatikiza zinthu zofunikira kapena zopangira zakumwa. Kusunga kuchuluka kwa thanki kumawonekera kumathandiza kulumikizana kwa EPC, chifukwa zida za boma, zomanga, ndi zotumizira zimadutsana ndi phukusi la Silo lachitsulo. Gawoli likuwonetsa zosankha za tanki zomwe zimagwiritsidwa ntchito limodzi ndi mayadi osungiramo ma silo.

 

Tanki Yosungira Zitsulo Yagalasi

 

Nthawi zambiri amagwiritsidwa ntchito ngati madzi ogwiritsira ntchito pafupi ndi mizere yosungiramo silo komwe kumafunika kukana dzimbiri komanso kuyimitsa mwachangu.

 

Tanki Yosungira Zitsulo Zosapanga dzimbiri

 

Amagwiritsidwa ntchito pomwe pakufunika ukhondo kapena kuwongolera dzimbiri. Ndizofala pafupi ndi malo osungiramo nkhokwe zosungiramo tirigu ndi mizere ya silo yosungiramo mankhwala.

 

Tanki Yosungirako Yokwera Yophatikizika

 

Amagwiritsidwa ntchito komwe kusungirako madzi okwera kumafunika komanso kukana dzimbiri kumafunika popanda mtengo wosapanga dzimbiri.

 

 

Tanki Yosungira Zitsulo za Carbon

 

Amagwiritsidwa ntchito pomwe zokutira ndi kuyendera zimayang'anira dzimbiri. Nthawi zambiri ntchito mafakitale kufalitsidwa madzi pa China zitsulo silo malo.

 

 

Kuti muwone mwachangu, zochitika khumi zomwe zili pansipa zikuwonetsa momwe zinthu ziliri ku banja lovomerezeka la Silo ndi malo ochepera ofunikira kuti malo osungiramo nkhokwe akhale okhazikika. Chiwonetsero chilichonse chikhoza kukulitsidwa kukhala nkhani yodzipatulira, pomwe tsamba ili la China steel silo limakhalabe ngati chikwatu chachikulu pakusankha silo.Zochitika khumi zadongosolo ndi:1) Mafuta a kokonati; 2) Lithium-mzere wopangira batire la ion; 3) Kutengerapo kwa zinthu; 4) Alumina; 5) PVC granule; 6) Zomangamanga makampani; 7) matenthedwe mphamvu chomera ntchentche phulusa; 8) zitsulo chomera slag ufa; 9) Mbewu; 10) Migodi.

 

 

China steel silo RFQ imakhala yolondola pokhapokha zolowetsa zalembedwa ngati njira zovomerezera. Mndandanda uwu umalepheretsa mipata ya silo yachitsulo ndikuteteza kusungidwa kwa silo.

 

Zambiri zakuthupi

 

• Kuchulukitsa kachulukidwe kachulukidwe, kagawidwe ka kukula kwa tinthu, gulu la chinyezi
• Chiwopsezo chakuyenda: kutsekereza, kukomoka, chizolowezi cha makeke
• Kutentha kosiyanasiyana ndi msinkhu wa abrasiveness
• Zofunikira paziwopsezo zafumbi ndi chandamale choyang'anira nyumba posungira silo

 

Ntchito ndi zotulukapo

 

• Kusungirako ndi kudzaza pafupipafupi pa silo iliyonse yosungirako
• Kuchulukira/kutuluka ndi kuchuluka-kutulutsa kokhazikika
• Kusamutsa njira kuti mumalize kusungirako silo: chotengera, elevator, Air Chute, kapena Silo Pump

 

Zoletsa pamasamba

 

• Chipinda chapamutu, malire a mayendedwe, mwayi wa crane, zenera loyimitsa
• Mphepo / chipale chofewa / zivomezi ku China zitsulo malo silo
• Malo owonongeka ndi njira yoyeretsera malo osungiramo silo

 

Zolumikizira zokhoma zisanapangidwe

 

• Kudzaza mawonekedwe ndi mawonekedwe otsegulira
• Dedusting mawonekedwe ndi njira yopezera
• Njira yothetsera vutoli ndi mlingo wa chithandizo
• Njira yokwezera-njira: kukweza m'galimoto, kukweza zinthu zambiri, kapena chikwama cha matani

 

Zolemba phukusi kuti amasulidwe

 

• Zojambula ndi mawonekedwe amtundu wa silo iliyonse yachitsulo
• Satifiketi zakuthupi ndi zolemba zokutira
• Umboni wa Weld ndi NDT wa kukula kwa welded
• -isanafike mbiri yoyendera katundu ndi mndandanda wa ntchito

 

Silos zachitsulo zimakhala ngati ma projekiti, osati zinthu zokha. Chomwe chimateteza ndandanda ndi kagwiridwe ka ntchito ndi zinthu zokhoza kutheka kupanga, kubwereza pulojekitiyi, ndiponso{1}}pambuyo pa malonda amene amasunga malire ake-mapangidwe, kutulutsa, fumbi, ndi malo olowera.

 

• China yopangira maziko okhala ndi QA yosinthika: Kupeza mbale potengera kutentha/mbiri, malekodi opangira zinthu, ndi malo oyendera fakitale ogwirizana ndi ITP yogwirizana-kuti mtundu wake ukhale umboni, osati wongoganiziridwa.
• Kutumiza kwa projekiti, osati "kupereka zida": Chigawo chimodzi cha phukusi chomwe chili ndi silo yachitsulo, malo otulutsiramo madzi, malire a fumbi, ndi matanthauzo a mawonekedwe popereka/kupakira-kuchepetsa udindo wogawanika ndi maoda osintha malo.
• Kuyimitsa-kuphatikiza kumodzi m'magulu: Silo yachitsulo + zipangizo zothandizira + matanki amadzimadzi ogwirizana ndi GA/interface matrix imodzi{2}}ogulitsa ochepa, ma flanges osagwirizana ochepa, okwera, ndi ma sigino owongolera.
• Zochitika zakupha zomwe zakhazikitsidwa muzopereka: Zoperekedwa zokhazikika pamagwirizanidwe a Civil/MEP (mapulani a nangula, katundu, ndandanda ya nozzles, kuyika kotsatizana, malo okweza), ogwirizana ndi mayendedwe wamba a EPC.
• Pambuyo-zogulitsa zogwirizana ndi zenizeni zenizeni: Yambitsani-zothandizira, ndandanda yoyang'anira ntchito, magawo ogwiritsira ntchito kuti atulutsidwe, mndandanda wa zotsalira, ndi kuthetsa mavuto akutali-zoyang'ana kwambiri kupewa nthawi yocheperako m'malo mwa "service" wamba.
• Accountable document chain: Kuyika chizindikiro → kupanga mapu → MTC → kuyang'anira/marekodi a NDT → mndandanda wazolongedza-imathandizira kuwunika, kuvomereza, ndi kukambirana kotsimikizira ndi umboni.

 

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