In a horse's harness, a heavy strap which passes behind the horse's body.

马宄带。

The parts that make up the breech of a gun.

枪炮之后膛部。

A flogging.

鞭打。

On a ship, a rope for securing a gun to the ship's side. to control the recoil.

(防止发射时炮身后退)炮索。