needle measuring valve

基本解释

• [地球科学]针形流量测定闸阀

英汉例句

双语例句

• 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.
  针型阀：是仪表测量管路系统中重要组成部分，主要有截止阀和球阀，其功用是作开启或切断管道通路用。
• 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.
  推出了一种新的针阀体座面圆跳动误差测量装置，介绍了误差的计算与评定方法。

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专业释义

地球科学

• 针形流量测定闸阀