名词

1. 圆柱体;圆筒
A cylinder is an object with flat circular ends and long straight sides.

2. (存放气体的)圆筒状物
A gas cylinder is a cylinder-shaped container in which gas is kept under pressure.

3. (发动机的)汽缸
In an engine, a cylinder is a cylinder-shaped part in which a piston moves backwards and forwards.

1. a cylindrical container for oxygen or compressed air

2. a chamber within which piston moves

Synonym: piston chamber

3. a solid bounded by a cylindrical surface and two parallel planes (the bases)

4. a surface generated by rotating a parallel line around a fixed line