A towed artillery carriage configuration where the gun is mounted between two wheels with a box-like structure connecting them.

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

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.