H41J升降式衬胶止回阀
J41J衬胶截止阀
G45J衬胶直流式隔膜阀
Z41J衬胶闸阀
H40J浮球式衬胶止回阀
H44J旋启式衬胶止回阀
J45J直流衬胶截止阀
G49J衬胶三通隔膜阀
G41J衬胶隔膜阀