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。

专业释义

地球科学

• 针形流量测定闸阀