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M'zaka zaposachedwa, ukadaulo ukakhwima komanso kukhathamiritsa kwagawidwe kwa msika, mafakitale a petrochemical, olefin akupezeka m'mitundu yosiyanasiyana yazinthu zopangira, makamaka pansi pa kaboni iwiri, nkhani yayikulu yokhudzana ndi Bob propane, ndi mphamvu ya chikhumbo cha Leon. .Werengani zambiri -
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Malingaliro omveka mu theka loyamba la chaka: Zotsutsana zazikulu: kukwera mtengo kumakhala ndi chiyembekezo chopanda malire cha kukwera kwa mitengo, koma akumana ndi vuto la kukwera kwa mitengo pansi pa zofuna zofooka.Kupanikizika kwamitengo kukupitilirabe, ndipo polypropylene imakhala yolimba m'mavuto pansi pazifukwa zolimba ...Werengani zambiri -
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Pamene polypropylene yaku China ikulowa pachimake pakukulitsa mphamvu, kutsutsana pakati pa kupezeka ndi kufunikira kumachulukirachulukira chifukwa kuchuluka kwa kufunikira kumatsika kuposa momwe amayembekezera.Makampani a polypropylene atsala pang'ono kulowa mu nthawi yochulukirapo.Kukhudzidwa ndi ...Werengani zambiri
