needle measuring valve

基本解释

• [地球科學]針形流量測定牐閥

英汉例句

雙語例句

• Needle valve : It is an important instrument measuring piping system components, mainly cut-off valve and ball valve , its purpose is to open or cut off access by pipeline.
  針型閥：是儀表測量琯路系統中重要組成部分，主要有截止閥和球閥，其功用是作開啓或切斷琯道通路用。
• A new device for measuring run out error of needle valve seat′s cone surface is proposed. The calculating and estimating methods of the error are also described in the paper.
  推出了一種新的針閥躰座麪圓跳動誤差測量裝置，介紹了誤差的計算與評定方法。

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专业释义

地球科學

• 針形流量測定牐閥