Coil spring: a helical metal spring used in vehicle suspension to absorb shocks and maintain wheel contact, compressing under load.

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

Manual: a tank transmission in which the driver selects gear changes manually, typically using a clutch pedal and gear lever to engage gears.

A fire control system relying on optical sights and manual input for aiming and range estimation without computer assistance.

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

A rifled gun has spiral grooves cut into its barrel.

Armour made by welding and rolling homogeneous steel plates.