Kusanthula kochepa kwa vavu yagulugufe yaku China: pali zolepheretsa kusindikiza ndi kukakamiza
Monga zida zomwe zimagwiritsidwa ntchito kwambiri powongolera madzimadzi,Valve ya butterfly yaku China ali ndi ubwino wa dongosolo losavuta ndi ntchito yosavuta, koma pali zolepheretsa kusindikiza ndi kukakamiza. Nkhaniyi isanthula zofooka za mavavu agulugufe aku China kuchokera kwa akatswiri.