Bajeti ndi kusanthula mtengo wogula ma valve aku China
Ndi chitukuko chosalekeza cha gawo la kupanga mafakitale, mavavu ngati zida zomwe zimagwiritsidwa ntchito m'mafakitale, kufunikira kwake kwa msika kukukulirakulira. M'mafakitale ambiri, mavavu amagwiritsidwa ntchito kwambiri mu petroleum, mankhwala, gasi, mphamvu yamagetsi ndi zina ...
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