1) external gauge
外径规
2) Thread snap gauge
螺纹外径规
3) plain snap gauge
普通外径规
4) bit ring
钻头外径规
5) adjustable limit snap gage
[机]可调极限外径规
6) Outside diameter
外径
1.
The characteristic of piping design is standardization and in series,and the standardization of the series of nominal diameter,outside diameter and thickness of pipe is the basis of the standardization of pipe fittings.
其中管道公称直径、外径和壁厚系列的标准化是管道元件标准化的基础。
参考词条
补充资料：规规默默
1.谨慎吞声貌。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。