... 接触角（公称接触角） contace angle (nominal contact angle) 公称接触点 nominal contact point 套圈（垫圈）基准端面 reference face of a ring (a washer) ...
双语例句
1
Compared to the new wheel tread, the worn tread is easy to form two-pointcontact nearby the depression area of the nominal diameter position of wheel tread.