needle measuring valve

基本解釋

• [地球科學(xué)]針形流量測定閘閥

英漢例句

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：是儀表測量管路系統(tǒng)中重要組成部分，主要有截止閥和球閥，其功用是作開啟或切斷管道通路用。
• 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體座面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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專業(yè)釋義

地球科學(xué)

• 針形流量測定閘閥