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     直行程調節閥,一般意義上是指調節閥動作運行位置改變的方向是上下方向,故而稱為直行程調節閥,常見的直行程調節閥有電氣動單座調節閥、雙座調節閥、套筒調節閥、籠式調節閥等等,與角行程調節閥結構有本質上不同。

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