China Chengda Engineering Co., Ltd.-Inner Mongolia Rongxin annual production capacity of 400000 tons of ethylene glycol and 300000 tons of DMMn project gate valve, globe valve, check valve, electric v

China Chengda Engineering Co., Ltd.-Inner Mongolia Rongxin annual production capacity of 400000 tons of ethylene glycol and 300000 tons of DMMn project gate valve, globe valve, check valve, electric valve