noun
recoil-operated cannon; cannon with a recoil system
Technical military term for a cannon that uses a recoil mechanism to absorb and manage the backward force when firing.
後座砲は発射時の反動を抑える仕組みを持っている。
A recoil-operated cannon has a mechanism to absorb the recoil when firing.
Compound of 後座 (recoil) and 砲 (cannon, gun). The term is a modern technical coinage.