英语语法分析

rollings

adj. 起伏的，绵延的；规则的，周而复始的；（走路）左右摇晃的，摇摆的；（水面）汹涌澎湃的；旋转的

n. 旋转，动摇，轰响

例句

Simulating test and vibration signal analysis for abrasive wear failure of rollings bearings have been made in this paper.

对滚动轴承磨粒磨损故障进行了模拟试验和振动信号的处理和分析。