A leaf spring is a simple spring made of one or more flexible metal strips bound together, used to absorb shocks and support weight in vehicle suspension, including some tanks.

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

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.