键槽轮毂的锥孔应至少有70%的着色（表面接触）转移到锥度计上？

Tapered bores for keyed hubs shall have a minimum of 70% transfer of bluing (surface contact) to the taper gage.

youdao

键槽轮毂的锥孔应至少有70%的着色（表面接触）转移到锥度计上？

Tapered bores for keyed hubs shall have a minimum of 70% transfer of bluing (surface contact) to the taper gage.

youdao