loose cover

美 [ˌluːs ˈkʌvər]英 [ˌluːs ˈkʌvə(r)]

loose cover

noun

usually pl.（椅子等的）活套，活罩
a cover for a chair, etc. that you can take off, for example to wash it

1

Stability analysis of Quaternary loose cover in carbonate rock region

隐伏碳酸盐岩区第四系松散盖层稳定性分析
2

The karst collapse occurred mostly in the period between lower water and high water and it happened in loose cover of different thicknesses .

它主要发生在枯水季节末期和雨季初的交替时期；
3

The up & down journey switch : loose the outside cover to check the touch point , and adjust again .

上下行程开关：松开外盖查看触点，重新调整。