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U (7 manufacturers)

U- (5 manufacturers)

U. (4 manufacturers)

UA (14 manufacturers)

UB (1 manufacturers)

UC (1 manufacturers)

UD (5 manufacturers)

UE (3 manufacturers)

UF (4 manufacturers)

UG (1 manufacturers)

UH (11 manufacturers)

UJ (1 manufacturers)

UK (1 manufacturers)

UL (76 manufacturers)

UM (8 manufacturers)

UN (99 manufacturers)

UP (28 manufacturers)

UR (27 manufacturers)

US (23 manufacturers)

UT (17 manufacturers)

UV (2 manufacturers)

UZ (1 manufacturers)