Drums with larger openings are considered to be of the removable head type.

开口更大的钢桶将视为活动盖钢桶。

youdao

Only the head and the hands were easily removable, and in this garb (in which he could not sit down) he would eat his sandwiches at lunchtime.

ECONOMIST: The Creature from the Black Lagoon

Cables head into the back of the base and connect beneath two user-removable panels on both sides of display's back -- making the only visible port the lone USB connector on the left side of the front.

ENGADGET: Wacom Cintiq 24HD touch review: the pen-enabled display tacks on multi-touch gestures