Chigamulo chogula ma valve ku China ndikukhazikitsa
Ndi kupita patsogolo kosalekeza kwa mafakitale, ma valve, monga zida zogwiritsira ntchito madzimadzi, amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana. M'ma projekiti a uinjiniya m'magawo amafuta, mankhwala, zitsulo, mphamvu zamagetsi, zomangamanga ndi ...
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