底径的英文

bottom diameter

root diameter

• 底:    bottom; base
• 径:    footpath; path; tr ...
• 螺纹底径:    bottom diameter of ...

例句与用法

1. Core diameter of thread
   螺纹底径
2. Some kind cylinder liner request measure nine parameters : inside and outside diameters in different positions , width of the boss of the part , hydraulic packing trough bottom diameter , shoulder place fillet partial diameter , and so on
   某型气缸套要求测量九个参数:不同位置内外径,凸台宽度,以及水封槽底径和肩台处的圆角部分的直径等。