offset disc burerfly valve
夹石棉织物的橡胶 elastomer with asbestos fabric insertion 偏心阀板蝶阀 offset disc burerfly valve; eccentric butterfly valve 阀芯(包括密封圈、杆等内件) trim ..
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eccentric butterfly valve
...棉织物的橡胶 elastomer with asbestos fabric insertion 偏心阀板蝶阀 offset disc burerfly valve; eccentric butterfly valve 阀芯(包括密封圈、杆等内件) trim ..
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