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.

A breech mechanism in artillery where the screw threads are interrupted to allow quick opening and closing of the breech.

Smoke grenades are pyrotechnic devices deployed by infantry fighting vehicles to create a visual screen, obscuring movement or positions from enemy observation or targeting.