casing
n. 框; 壳; 罩; 套
A casing is a substance or object that covers something and protects it.
...the outer casings of missiles.
导弹的外壳
1. the housing or outer covering of something;
2. the outermost covering of a pneumatic tire
3. the enclosing frame around a door or window opening;
The vacuum flask has a strong casing, which won't crack or chip.
这种热水瓶瓶身坚固,不易断裂破碎。
This wire has a plastic casing.
这种电线外包塑料.
There is a window fitting in a casing.
有一扇装在框内的窗.
The casing was driven into the soft muds in the top.
套管被送入软岩粉顶.
Creeping to the window, he peeped cautiously between casing and blanket.
他蹑手蹑脚走到窗口, 小心翼翼地从窗框和毡子之间向外张望.