High expansion steel是什么意思

用法例句

An experimental study of the influence of pressure on Umf and bed expansion height by the photographing with a camera was carried out in a fluidized bed of 60 mm i.

5MPa的冷模加压流化床实验装置上,对两种不同粒径颗粒的最小流化速度和床层膨胀高度进行了研究。