偏心法兰蝶阀减少密封圈摩擦阀体球墨铸铁材质

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Kot valves limited, tianjin city

Address:Pan hsiung industrial park, ning river district, tianjin city
Tel:15222305305

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15222305305

偏心法兰蝶阀 减少密封圈摩擦 阀体球墨铸铁材质