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Glossary U

U

Unitarnij — single piece ammunition. This is to distinguish single piece (cartridge loading) ammunition from separate loading ammunition. Prefix used for Soviet ammunition nomenclature. (Russian)

umg

umgeändert — modified. (German)

undermatch

Refers to the Thickness to Diameter ratio (T/D). For example, a projectile is said to overmatch the armour plate if T/D<1 (i.e., the diameter of the projectile exceeds the thickness of the armour plate), and undermatch if T/D>1. Generally when a projectile overmatches a plate the projectile benefits, and vice versa.

upr

upper.

USV

usovershenstvovannaya — modernised, improved. (Russian)

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