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美国keystone蝶阀中国代理，现货keystone蝶阀 ?keystone阀门维修，安装，售后，keystone蝶阀维修，维修keystone蝶阀。keystone蝶阀中国服务商，维修keystone阀门。keystone气动蝶阀，keystone气动开关蝶阀，keystone气动调节阀，keystone油田用气动蝶阀 keystone船用蝶阀，keystone啤酒蝶阀。keystone气动执行器，keystone气动头。常规型号：F990CEE2,F990T805,F990T723,F990CEE4,FAR1T805,FAR1T723,FAR1T064,F611DEE2,F611DEE3,F360T158,F360T159,

F370T104,F370159,F370T158,F79U180,F79U090,F79U065,F79U036,F79U024,F79U012,F79U006,F79U003,F791N电磁阀，791N024DND1MNN0,CR-0B201BD00-00-0R1,LP-0B201BN00-00-0R1,AL-0A203BD00-00-AR2,ZR-0B201BD00-00-0R1.等等。常用的阀座材质有：EPDM,NBR,RTFE.

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??????????特点及优点

*Keystone标准顶法兰

*关闭严密

*阀杆两级密封

*寿命长

*连接方式：对夹、支耳