This article presented a teaching experimental platform on general measurement and selected mating about the roller bearing pretension backup plate. 介绍了一种以滚动轴承预紧垫片综合测量选配为主的教学实验平台。
The middle is a large, double-height trapezoidal plate that accommodates all galleries from the Archaic period to the Roman Empire. 中间是一个巨大的,两倍高度的梯形平台可以用来展出从远古时期到罗马帝国时期所有展览。