A screw-type breech mechanism for artillery, featuring a interrupted-thread breech block that seals the chamber via obturation, used in 19th-century French cannons.

A fixed mount or garrison artillery refers to a weapon system permanently emplaced for defensive or coastal fortification duties, not designed for mobile deployment.

High Explosive (HE) round: an artillery or mortar projectile containing explosive filler designed to inflict damage through blast and fragmentation effects.

Operated, moved, or controlled by fluid pressure, typically oil, used in mechanisms like recoil systems to absorb and manage energy.