Bell-crank suspension is a tank suspension system that uses a lever (bell crank) to convert vertical wheel movement into horizontal motion to compress a spring or torsion bar.

High-Explosive Fragmentation: ammunition that explodes on impact, releasing fragments.

A refined product derived from crude oil, used as a fuel for internal combustion engines. A volatile, flammable liquid mixture of hydrocarbons.

Armour made from steel plates joined by rivets.

A smoothbore gun is a firearm with an unrifled barrel, allowing projectiles to travel without spin; it is commonly used in modern tank main guns for firing fin‑stabilized ammunition.