triple-offset butterfly valve / high-performance neles l6 series
卫生级不锈钢法兰端蝶阀气动蝶阀 - buy butterfly valve,flange end
蝶阀(英文:butterfly valve)是指关闭件(阀瓣或蝶板)为圆盘,围绕阀轴
电液动蝶阀electrichydraulicbutterflyvalve
31u series butterfly valve 2 – 20″, 285 psi
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