A bar of wood, metal, etc., used to move a heavy object by placing one part of it against the object, bracing it against something fixed, and lifting or pushing on the other hand.

杠杆。

Any rigid bar turning about a fixed point and having counteracting forces applied at two other points.

【机】手杆(绕着固定支点转动者，其支点两端则互为反作用力)。

Any means, instrument, or agency used for achieving a purpose; tool.

手段；作用力；工具。