[wài ké]
hull; incrustation; outer skin; outermost shell; case; shell; jacket; package; housing; skin; sleeve; body; outer covering; outer casing; crust; sheathing; exochite
battery case
電池外殼
the outer casing of a thermos flask
熱水瓶外殼
This kind of beetles have hard shell.
這類甲蟲有堅硬的外殼。