乔石的英文：
Qiao Shi (Chinese leadership contender)

crepe de chine yarn
双绉纱

The old prefessor came back to Chine in 1949 when the mainland had just been liberated .
这位老教授是在1949年回到中国的,当时大陆刚解放。

Chining and embossing operations particularly require heavy pressures in order to force the metal into the design on the face of the tools.
压花、压币工序特别需要高压来强使金属形成工具面的图形。