蜗轮传动铸钢通风蝶阀TD341W-6C
铸钢截止阀J41H-16C ..
氨用截止阀J41B-16C ..
蜗轮传动软密封蝶阀D371X..
蜗轮传动铸钢通风蝶阀TD34..
电动蝶阀D941X-10/1..
气动蝶阀D671X-10/1..