HC41X-16上海止回阀厂上海冠工阀门厂微阻缓闭式止回阀底阀升降式止回阀旋启式止回阀消声止回阀蝶形止回阀滚球式止回

HH47、H47XF、HDH47X蝶式缓冲止回阀

国标旋启式止回阀

J41W/YAPI旋启式止回阀

H44W/Y旋启式止回阀

JL47H/Y*式止回阀

铸钢止回阀 H41H-16C

消声止回阀 HC41X-16