没有磨损或破损的电线 No frayed or damaged cords
由于凹面与凸面之间没有磨损，螺母可以重复使用。
Because there is no abrasion between the concave and convex, the nut is reusable.
主轴和轴座间安装有自润滑轴承不用加油，没有磨损。
The compound bearing installed between the headstock and bearing seat does need any lubrication. No wearing.
想到月球表面上的东西一点都没有磨损，使人非常奇怪。
It's strange to think that nothing wears away on the moon's surface.
应用推荐