服务员们匆匆忙忙穿过走道，把一盆盆汤重重地放在桌上。Waiters went scurrying down the aisles, thumping down tureens of soup.给服务员、行李搬运工、导游和司机小费是惯例。It is usual to tip waiters, porters, guides and drivers.女服务员看着他，脸上带着一丝局促不安的微笑。The maid looked at him, ...
键槽的生成是用了0.63最小圆狐的尺寸条件.Was the keyway created using a min arc condition dimension of .0.63?差于无键槽的印版滚筒,螺丝一不退给拧紧.For non - key way of plate cylinder screws must be tightened up.本插床可插各种大、中型零件内外平面、型面和键槽等粗精加工.This slotting mac...