Momwe Kukonza Pump ya Hydraulic Kumathandizira Kuchepetsa Ndalama Zogwirira Ntchito

Kukonza pampu ya hydraulic kumachepetsa ndalama zogwirira ntchito popewa kutayika kwa mphamvu, nthawi yosakonzekera yogwira ntchito, komanso kuwonongeka kwa zida mwachangu. Mu makina a hydraulic a mafakitale, kutayika pang'ono kwa mphamvu ya volumetric, kutayikira kwamkati, kapena kuwongolera kuipitsidwa kumatha kukweza kugwiritsa ntchito mphamvu mwachangu ndikufupikitsa moyo wa pampu. Njira yokonza yotsika mtengo kwambiri si kukonza mwachangu; ndi chisamaliro chokhazikika chomwe chimasunga pampu mkati mwa zenera lake lopanikizika, kuyenda, ndi ukhondo. Kwa ogula omwe amayesa njira zosinthira kapena kukweza, mapangidwe abwino osamalira monga mabanja ogwirizana a pampu ya vane, kupezeka kwa spare-core, ndi makina osungira mphamvu a servo amatha kuchepetsa mtengo wonse wa umwini pakupanga jakisoni, zida zamakina, ndi ntchito zama makina am'manja.

Kukonza pampu ya hydraulic nthawi zonse kumateteza magwiridwe antchito, zomwe zimachepetsa kugwiritsa ntchito magetsi komanso kupanga kutentha.
Kuwongolera kuipitsidwa, kusefa bwino, ndi kuwunika chisindikizo ndi njira zachangu kwambiri zopewera kuwonongeka kwa pampu yokwera mtengo.
Mapampu osinthika ogwirizana ndi zida zina zomwe zilipo zingachepetse nthawi yogwira ntchito kuposa mtengo wotsika wogulira.
Ma servo ndi ma hydraulic solutions osinthika amatha kusintha ndalama zogwirira ntchito ngati nthawi yogwirira ntchito ili yokhazikika mokwanira kuti ikwaniritse kukwezaku.

Kukonza pampu ya hydraulic ndi njira imodzi yothandiza kwambiri yochepetsera ndalama zogwirira ntchito chifukwa imateteza kugwiritsa ntchito mphamvu moyenera komanso nthawi yogwira ntchito. Ma code a ISO 4406 odetsa amagwiritsidwa ntchito kwambiri poyang'anira ukhondo wa madzi a hydraulic, pomwe njira zodziwika bwino zamafakitale zimafuna kuti magwiridwe antchito agwirizane, kuthamanga, ndi kuyenda bwino mkati mwa malire okhwima; m'magwiritsidwe ntchito ambiri amakina, kulolerana kwa machitidwe oyenda kumayesedwa mu ma micrometer, ndipo kusuntha kwa magwiridwe antchito a hydraulic kumatha kuwoneka mwachangu mu zinyalala, kukonzanso, ndi nthawi yopuma. Kwa magulu omwe akuyerekeza njira zosinthira,mabanja azinthu zopangira pampu ya hydraulic, vane mpope mndandandandimachitidwe opulumutsa mphamvu a servonthawi zambiri zimayesedwa pamodzi chifukwa ndalama zokonzera zimayendetsedwa ndi dongosolo lonse, osati thupi la pampu lokha.

Chifukwa chiyani kukonza pampu ya hydraulic kumachepetsa ndalama zogwirira ntchito

Kusunga ndalama koyamba kumachokera pakupewa kutaya mphamvu, komwe nthawi zambiri sikuoneka mpaka bilu yamagetsi kapena magwiridwe antchito a makina asintha. Pampu ya hydraulic yomwe imataya madzi mkati, kuwonongeka, kutsekeka kwa cavitation, kapena kuipitsidwa imafunikira mphamvu yowonjezera kuti ipereke mphamvu ndi kayendedwe kofananako. Mwachidule, izi zikutanthauza kuti ntchito yomweyi imawononga magetsi ambiri, imapanga kutentha kwambiri, ndipo imaika nkhawa kwambiri pa zisindikizo, mapayipi, ndi moyo wamafuta.

Ndalama yachiwiri yosungidwa imachokera ku chitetezo cha nthawi yogwira ntchito. Kuyimitsa kosakonzekera nthawi zambiri kumawononga ndalama zambiri kuposa gawo lolephera chifukwa kumasokoneza nthawi yopangira, nthawi yogwiritsira ntchito zida, kukonzekera ntchito, ndi zomwe zimafunika kuti ziperekedwe. Dipatimenti ya Zamagetsi ku US ikunena kuti makina opangira mafakitale amapereka mphamvu yayikulu yowongolera magwiridwe antchito, ndipo makina a hydraulic ndi ofunikira kwambiri pakutaya kutentha ndi kuthamanga kwa mpweya; kuchepetsa kutayika kumeneku ndi njira imodzi yolunjika yochepetsera ndalama zogwirira ntchito m'mafakitale enieni. Onani zinthu za DOE Motor Systems pahttps://www.energy.gov/eere/amo/motor-systems.

Ndalama yachitatu yosungira imachokera pakuwonjezera nthawi ya moyo wa chipangizocho. Ngati ukhondo wamadzimadzi, kuyika mphamvu, ndi kutseka shaft zikusungidwa bwino, mapampu amakhala nthawi yayitali ndipo amasunga mawonekedwe awo pafupi ndi kapangidwe kake. Zimenezi zimachepetsa kugwiritsa ntchito zinthu zina komanso maola ogwira ntchito omwe amagwiritsidwa ntchito pokonza zinthu mwadzidzidzi.

Ziyeso zosamalira pampu ya hydraulic zomwe ndizofunikira kwambiri

Si malo onse owunikira omwe ali ndi zotsatira zofanana pazachuma. Macheke apamwamba kwambiri ndi omwe amawonetsa kusintha kwa magwiridwe antchito asanayambe kulephera.

Chinthu chokonzera	Zomwe zimakhudza	Zotsatira za mtengo wamba	Zoyenera kuyeza
Kuipitsidwa ndi madzimadzi	Kuvala, kugoletsa, kumatirira valavu	Pamwamba	Khodi ya ukhondo ya ISO 4406
Kutuluka kwa ngalande m'chikwama	Kutayikira ndi kuvala mkati	Pamwamba	Zochitika motsutsana ndi zomwe zinalipo kale
Kutentha kogwira ntchito	Kusungunuka kwa mafuta ndi moyo wosindikiza	Pakati mpaka pamwamba	Kukhazikika kwa malo poyerekeza ndi malire a alamu
Phokoso ndi kugwedezeka	Kutsegula m'mimba, mpweya, kuwonongeka kwa mabearing	Pamwamba	Kuwunika momwe zinthu zilili komanso kusanthula zomwe zimayambitsa
Kuthamanga kwa kupanikizika	Kukhazikika kwa dongosolo ndi kuvala kwa actuator	Pakatikati	Yerekezerani ndi muyezo wa makina

Pulogalamu yothandiza yokonza zinthu imagwiritsa ntchito miyezo imeneyi ngati njira zomwe zikuchitika, osati ngati mawerengedwe odzipatula. Kuwerenga kuthamanga kamodzi kungawoneke bwino pomwe kutuluka kwa madzi m'chimbudzi kumakwera pang'onopang'ono, kusonyeza kuti pampu ikutha mkati. Umenewo ndi mtundu wa kusuntha komwe kumakweza ndalama zogwirira ntchito nthawi yayitali isanalepheretse kupanga.

Momwe kuwongolera kuipitsidwa kwa madzi kumachepetsera mtengo wogwiritsira ntchito madzi

Kuwongolera kuipitsidwa ndi njira yofulumira kwambiri yokonzera poteteza bwino ntchito ya pampu ya hydraulic. Tinthu tolimba timapangitsa kuti pakhale kuwonongeka kwakukulu pa nsonga za vane, malo ozungulira, mabearing, ndi malo owongolera. Kuipitsidwa kwa madzi kumatha kuchepetsa mafuta ndikufulumizitsa dzimbiri. Kulowa kwa mpweya kungayambitse thovu, phokoso, ndi kutsekeka kwa mphuno, zomwe zimawononga mkati mwa pampu ndikuchepetsa kutulutsa bwino.

Zolinga za ISO zoyeretsa zimagwiritsidwa ntchito nthawi zambiri chifukwa zimapangitsa kuti madzi azikhala bwino kukhala lamulo loyezeka losamalira.ISO 4406imafotokoza njira yodziwira kuipitsidwa kwa madzi amadzimadzi, pomweMayunitsi a NIST SIimapereka njira yoyezera momwe zinthu zimayendera nthawi zonse poyang'anira mafakitale. Ngati ukhondo utsatiridwa nthawi zonse, magulu okonza zinthu amatha kulumikiza kuwonongeka kwa pampu ndi momwe zinthu zilili m'malo mongoganizira.

Gwero la kuipitsidwa	Chizindikiro chofala	Zotsatirapo za mtengo wake	Ntchito yokonza
Mafuta odzolanso odetsedwa	Kukwera kwa kuvala koyambirira	Moyo waufupi wa pampu	Sefa mafuta obwera musanadzaze mafutawo.
Mpweya wotopa	Kulowa kwa chinyezi	Kuwonongeka kwa chisindikizo	Sinthani chinthu chopumira
Fyuluta yolambalalitsidwa	Tinthu timazunguliranso	Kukanikiza kwa valavu ndi kutentha	Tsimikizani kupanikizika kosiyana ndi nthawi yosinthira
Madzi oundana m'chitsime	Yankho lofooka	Kutaya mphamvu ndi nthawi yopuma	Tsukani thanki ndikuyang'ana chingwe chokokera madzi

M'mafakitale ambiri, kukonza kotsika mtengo kwambiri ndi komwe sikunafunikire chifukwa kusefa ndi kukonza mafuta kunayendetsedwa bwino kuyambira pachiyambi. Ichi ndichifukwa chake magulu okonza nthawi zambiri amawona phindu lachangu kuchokera ku njira yosavuta yochepetsera kuipitsidwa asanagule malo atsopano opopera.

Momwe nthawi zowunikira zimakhudzira mtengo wokonza pampu ya hydraulic

Kuchuluka kwa nthawi yowunikira kuyenera kufanana ndi kuopsa kwa nthawi yogwirira ntchito, osati kalendala yodziwika bwino. Pampu yomwe ikuyenda ndi mphamvu yamagetsi, imayamba ndi kuyima pafupipafupi, kapena nthawi yotenthetsera kwambiri idzakalamba mofulumira kuposa chipangizo chodzaza pang'ono, kotero nthawi yowunikira iyenera kukhala yochepa.

Ndondomeko yothandiza kwambiri imaphatikiza macheke a tsiku ndi tsiku, sabata iliyonse, ndi mwezi uliwonse.

Tsiku ndi tsiku: yang'anani phokoso, kutentha, kutuluka kwa madzi, ndi kukhazikika kwa kuthamanga kwa magazi.
Sabata iliyonse: yang'anani zosefera, zolumikizira, ndi momwe madzi alili.
Mwezi uliwonse: kuyenda kwa madzi m'chikwama choyendera, momwe mafuta amayendera, komanso momwe mafuta alili.
Kotala lililonse: kuwunikanso kulinganiza, mphamvu yokwezera, ndi zolemba za kuipitsidwa.

Njira imeneyi imachepetsa ndalama zogwirira ntchito chifukwa imagwira ntchito molakwika pa nthawi yoyambirira yazachuma. Kulumikizana kosasunthika kapena kutayikira pang'ono kwa madzi kumakhala kotsika mtengo kwambiri kukonza panthawi yowunikira yomwe yakonzedwa kuposa pambuyo poti madzi awonongeka pamwamba pa pampu.

Kusankha ndi kusintha mapampu mosavuta pokonza

Kusankha mapampu n'kofunika chifukwa mapangidwe ena ndi osavuta kusamalira, kusintha, ndi kusunga m'sitolo kuposa ena. Mu zida zakale, kuyanjana nthawi zambiri kumakhala chinthu chobisika chomwe chimawononga ndalama: ngati pampu yosinthira ikugwirizana ndi kukula kwa malo oikira, mtundu wa mawonekedwe, ndi kuchuluka kwa kuthamanga, makinawo amabwerera kuntchito mwachangu komanso popanda chiopsezo chocheperako choyambitsa. Ichi ndi chimodzi mwa zifukwa zomwe mapampu osinthira omwe amagwirizana ndi omwe amasinthidwa nthawi zambiri amatchulidwa pogula zinthu zomwe zimakonzedwa.

Kwa ogula poyerekeza chithandizo cha mndandanda ndi zida zina, zosankha zomwe zimayang'ana kwambiri kukonza nthawi zambiri zimakhala zomwe zimakhala ndi kuthekera kosinthasintha komanso kufalikira kwa mitundu yonse, mongaPampu ya vane ya mndandanda wa T6, Pampu ya T7 mndandanda wa vanendiPampu ya PV2R mndandanda wa vaneMu mapulojekiti okonzanso zinthu, kugwirizana kungakhale kwamtengo wapatali kuposa mtengo wotsika pang'ono wogulira chifukwa kumachepetsa ntchito yosinthira, chiopsezo cha kukhazikitsa molakwika, komanso kuchedwa kwa nthawi yayitali.

Chinthu chosankha	Chifukwa chake zimachepetsa mtengo	Zoyenera kutsimikizira musanagule
Kugwirizana kwa malo	Nthawi yochepa yopuma	Flange, shaft, mtundu wa doko
Kuyeza kwa kupanikizika	Zimaletsa kulephera kwa zinthu zambiri	Kupanikizika kwakukulu kwa dongosolo ndi kayendedwe ka ntchito
Kupezeka kwa zigawo	Kuyimitsa kochepa kwa nthawi yayitali	Zida zosindikizira, zida za makatiriji, zowonjezera
Zolemba zautumiki	Kukonza mwachangu	Mabuku a malangizo, zolemba zoyika, mapu osinthira

Kusintha kwa malo kukakhala kotere, kukonza kumakhala chisankho cha moyo wonse m'malo mongokonza kamodzi kokha. Kusintha kumeneko ndiko kumachepetsa ndalama zonse zogwirira ntchito pakapita nthawi.

Pamene makina a servo hydraulic amawononga ndalama zochepa kuposa kukonza kokha

Machitidwe a hydraulic a Servo amatha kuchepetsa ndalama zogwirira ntchito pamene mawonekedwe a katundu amasintha pafupipafupi ndipo makinawo amakhala ndi nthawi yofunikira pansi pa kufunikira kwakukulu. Pazochitika zimenezo, pampu yotulutsa mphamvu yokhazikika imatha kuwononga mphamvu mwa kukakamiza kuyenda kochulukirapo m'ma valve opumulira kapena kudzera mu kutayika kwa throttling, pomwe makina oyendetsedwa ndi servo amatha kufanana ndi kufunikira kwa kutulutsidwa.

Izi ndizofunikira kwambiri pakupanga jakisoni, zida zamakina zolondola, ndi machitidwe ena okhala ndi kufunikira kobwerezabwereza koma kosinthasintha kwa katundu. Bungwe la US Environmental Protection Agency likuwonetsa kukula kwa mwayi wowongolera mphamvu zamafakitale kudzera muzinthu zake zamafakitale za ENERGY STAR kuhttps://www.energystar.gov/products/energy_savings_athome_industrial.Pankhani ya hydraulic, izi zikutanthauza mphamvu zochepa kuwononga, kutentha kochepa kwa mafuta, komanso nthawi zambiri nthawi yayitali yogwiritsira ntchito zisindikizo ndi mapayipi.

Kwa makampani omwe akuganiza zosintha zinthu,mayankho a dongosolo la servondiZosankha za pampu ya ABT servo vanenthawi zambiri amawunikidwa potengera njira yobwezera ndalama osati njira yodziwira yokha. Ngati nthawi yogwirira ntchito ndi yokhazikika ndipo makinawo amagwira ntchito maola ambiri patsiku, kusunga mphamvu kungathandize kuti makinawo ayambe kugwira ntchito bwino. Ngati makinawo agwira ntchito kale pafupifupi nthawi zonse, kukonza koteteza kungapereke phindu labwino kwambiri kuposa kukonzanso makina.

Mndandanda wotsatira wokonza mapampu a hydraulic kuti muchepetse mtengo wonse wa umwini

Mndandanda wokhazikika umasintha kukonza kuchokera ku zinthu zongoganizira kukhala njira yowongolera ndalama.

Chithunzi 1: Momwe Kukonza Pump ya Hydraulic Kumathandizira Kuchepetsa Ndalama Zogwirira Ntchito

Lembani kuthamanga kwa madzi, kutentha, phokoso, ndi kayendedwe ka madzi otuluka mu chubu pamene pampuyo ili yatsopano kapena yatsopano.
Tsimikizirani kuti mafuta ndi oyera ndipo sinthani zosefera musanayambe kupanikizika kwambiri.
Yang'anani mizere yokokera mpweya kuti muwone ngati pali zotsekera, zopindika, komanso zotsekeka.
Yang'anani momwe ma coupling alili komanso momwe ma bolts amakhazikitsidwira pambuyo pokhazikitsa ndi kugwedezeka.
Deta ya momwe zinthu zikuyendera mwezi uliwonse ndikuyerekeza ndi zomwe zayamba kale.
Bwezerani zomangira, makatiriji, ndi zinthu zosweka musanawononge zina.

Ndondomeko imeneyo ndi yosavuta, koma imaletsa njira yotsika mtengo kwambiri yolephera: kutayika pang'ono kwa mphamvu zomwe zimapangitsa kuti ntchito izitha kugwira ntchito kwambiri.

Zolakwika zomwe zimakweza mtengo wogwiritsira ntchito ma hydraulic

Cholakwika chachikulu kwambiri pakukonza ndi kuyembekezera kuti pampu iwonongeke. Pofika nthawi yomwe pampu imayamba kuphulika kapena kutentha kwambiri moti aliyense angazindikire, nthawi zambiri kuwonongeka kwakhala kukukulirakulira kwa milungu kapena miyezi.

Cholakwika china chofala kwambiri ndikusintha gawo lolephera popanda kuyang'ana chomwe chayambitsa. Ngati kuipitsidwa, kuletsa kuyamwa, kapena kusakhazikika bwino kwayambitsa kulephera, pampu yatsopano nthawi zambiri imakumana ndi vuto lomwelo. Kukonza bwino kumaphatikizapo chomwe chayambitsa dongosolo, osati chizindikiro chokha.

Cholakwika chachitatu ndi kugula pamtengo wokha. Mu ma hydraulic a mafakitale, kusintha kotsika mtengo komwe sikukugwirizana, chithandizo cha zida, kapena zikalata kungapangitse ndalama zobisika pakuyambitsa ntchito ndi ntchito zamtsogolo.

Cholakwika	Zotsatira za kanthawi kochepa	Mtengo wa nthawi yayitali	Kuchita bwino
Kunyalanyaza kukwera kwa kutentha koyambirira	Palibe kutsekedwa nthawi yomweyo	Kuwonongeka kwa mafuta ndi kuwonongeka kwa zisindikizo	Konzani ma alamu a kutentha
Kudumpha mayeso osefera	Amapulumutsa antchito lero	Kuvala mwachangu	Mkhalidwe wa fyuluta ya track
Palibe deta yoyambira	Kuchedwetsa kuchitapo kanthu mosavuta	Kusanthula kovuta kwa zomwe zimayambitsa	Kujambula mfundo zoyendetsera ntchito
Kusankha kolakwika kwa cholowa m'malo	Zikuoneka zotsika mtengo	Kupuma kwa nthawi yayitali	Miyeso ndi ntchito yofanana

Zimene ogula ayenera kufunsa asanasankhe njira yokonzera pampu ya hydraulic

Njira yoyenera imadalira kugwiritsa ntchito, mtengo wolephera, ndi zida zosinthira. Fakitale yokhala ndi nthawi yotsika mtengo yogwira ntchito iyenera kuvomereza kuyang'anira mwachangu komanso zida zokonzera zinthu zambiri, pomwe mzere wosafunikira kwambiri ungapangitse kuti nthawi yokonzanso ikhale yofunika kwambiri.

Musanapange chisankho, funsani mafunso awa:

Kodi mtengo weniweni wa ola limodzi la zinthu zomwe zatayika ndi wotani?
Ndi njira iti yolephera yomwe imakonda kugwiritsidwa ntchito: kuipitsidwa, kukalamba, kutentha kwambiri, kapena kusakhazikika bwino?
Kodi pampu yamagetsi ingakonzedwe ndi katiriji kapena chida chapakati?
Kodi chitsanzo cholowa m'malocho chikugwirizana ndi makina oyambirira?
Kodi kukweza kwa servo kungachepetse mphamvu zokwanira kuti zitsimikizire kuti ndalamazo zasungidwa?

Mafunso awa amayang'ana kwambiri mtengo wogwirira ntchito osati mtengo wogulira wokha.

Kukonza pampu ya hydraulic ndi miyezo yapadziko lonse lapansi

Miyezo imapatsa magulu okonza zinthu chilankhulo chofanana cha magwiridwe antchito, ukhondo, ndi kuyenerera. Zimenezi ndizofunikira pamene zipangizo zikutumizidwa kunja, kukonzedwanso, kapena kukonzedwa m'mafakitale osiyanasiyana.

Kuti muwone kuipitsidwa kwa zinthu,ISO 4406amadziwika kwambiri. Pa zojambula zaukadaulo ndi kulumikizana kogwirizana, kupanga molondola nthawi zambiri kumadalira njira zokhazikika mongaMfundo za ISO GPSKwa magulu okonza omwe amagwira ntchito ndi mapampu osinthira ndi malo olumikizirana ndi makina, deta yokhazikika imapangitsa kuti kutumiza kukhale kofulumira komanso kuchepetsa chiopsezo cha zolakwika.

Poganizira za mtengo, miyezo si yongolemba mapepala okha. Imachepetsa kusamveka bwino, imafupikitsa mavuto, komanso imawonjezera mwayi woti gawo lina ligwire ntchito monga momwe limayembekezeredwa pa nthawi yoyamba kukhazikitsa.

FAQ

Kodi kukonza pampu ya hydraulic kuyenera kuchitika kangati?

Mafupipafupi okonza ayenera kutsatira kayendedwe ka ntchito ya makina ndi mulingo wa chiopsezo. Makina opanikizika kwambiri, kutentha kwambiri, kapena ntchito yapamwamba nthawi zambiri amafunika kufufuzidwa tsiku ndi tsiku komanso momwe magwiridwe antchito amayendera pamwezi, pomwe makina osafunikira kwambiri angadalire nthawi yayitali.

Kodi chifukwa chachikulu cha kulephera kwa pampu ya hydraulic ndi chiyani?

Kuipitsidwa ndi chimodzi mwa zifukwa zofala kwambiri chifukwa tinthu tating'onoting'ono, chinyezi, ndi mpweya zonse zimathandizira kuwonongeka ndipo zimachepetsa mphamvu ya mapampu. Mavuto okhudzana ndi kuyamwa ndi kutentha kwambiri ndizomwe zimayambitsanso vutoli nthawi zambiri.

Kodi kukonza pampu ya hydraulic kumachepetsadi mtengo wamagetsi?

Inde. Pamene pampu itaya mphamvu kapena kutentha kwambiri kuposa momwe idapangidwira, imafunika mphamvu zambiri zolowera kuti itulutse mphamvu zomwezo. Kusunga pampuyo m'njira yofunikira kumachepetsa zinyalala ndikuchepetsa mphamvu yogwirira ntchito.

Kodi ndiyenera kukonza kapena kusintha pampu ya hydraulic yomwe yatha ntchito?

Kukonza nthawi zambiri kumakhala bwino ngati nyumba ndi malo ogwirira ntchito akadali okonzeka. Kukonzanso nthawi zambiri kumakhala bwino ngati kukugwirizana, nthawi yogwira ntchito, kapena kuwonongeka kwa mkati kumapangitsa kukonza kukhala kosapindulitsa.

Kodi ndiyenera kuyang'ana chiyani poyamba ngati pampu ya hydraulic ili ndi phokoso?

Yang'anani kaye momwe mafuta amayamwira, kuchuluka kwa mafuta, mpweya wolowa, ndi kuipitsidwa. Phokoso nthawi zambiri limasonyeza kuti mpweya walowa, kapena kuti mpweya walowa, kapena wawonongeka m'malo mongoyambitsa vuto lokha la kupanikizika.

Kodi makina a servo hydraulic nthawi zonse amakhala otsika mtengo kugwiritsa ntchito?

Ayi. Ndi zotsika mtengo kwambiri ngati katunduyo wasiyana mokwanira kuti mphamvu yosungira ikhale yofunika. Ngati makinawo akuyenda bwino nthawi zonse, kukonza koteteza kungathandize kuti zinthu ziyende bwino.

Ndi zikalata ziti zomwe zimathandiza kuchepetsa ndalama zokonzera zinthu pakapita nthawi?

Mabuku ophunzitsira kukhazikitsa, mamapu osinthira, mndandanda wa zida zosungira, zolemba zowunikira, ndi zolemba zaukhondo zimathandiza magulu kuzindikira mavuto mwachangu ndikupewa kulephera mobwerezabwereza.

Nthawi yotumizira: Ogasiti-03-2026