供应法兰旋启式衬胶止回阀H44J

供应法兰直流式衬胶截止阀J45J

供应蜗轮对夹式衬胶蝶阀D371J

供应手柄法兰衬胶蝶阀D41X

供应手柄对夹式衬胶蝶阀D71X/J

供应法兰衬胶管夹阀GJ41X

供应蜗轮法兰式衬胶蝶阀D341J

供应电动衬胶隔膜阀G941J

供应法兰堰式衬胶隔膜阀G41J

供应法兰直通式衬胶隔膜阀G46J