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Valves are to be of the pneumatically operated jacket pinch type with integral flanged joint ends.
阀门是气动操作套管夹紧类型,带整体法兰连接装置.
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Valves are to be of the pneumatically operated jacket pinch type with flanged joint ends.
阀门是气动操作套管夹紧类型,带法兰连接装置.
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