Tapered bores for keyed hubs shall have a minimum of 70% transfer of bluing (surface contact) to the taper gage.是什么意思_Tapered bores for keyed hubs shall have a minimum of 70% transfer of bluing (surface contact) to the taper gage.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句