当断开邻近的管道进行维修或更换时，可能需要堵塞这个端口的流体。

Flow can be blocked at this port while adjacent piping is disconnected for repair or alteration.

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内部反压跨端口设计使两棒，与空气过收回以轻松地清除堵塞部分。

Internal back pressure cross-port design allows both rods to be retracted with the air off to easily clear jammed parts.

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