universal background checks

U-joint (universal joint / universal coupling)

preventive maintenance checks and services (PMCS)

system of checks and balances

Trails, Lay, Aimpoint established, Boresight verified, Safe [verification of lay], Prefire checks performed, Ammunition Prepared

maintenance checks / routine maintenance, scheduled tasks

routine maintenance / scheduled tasks, maintenance checks

scheduled tasks / routine maintenance, maintenance checks

background information

background noise

background check

background radiation

background sound pressure level

natural background radiation

final background sound pressure level

background

background count

background counting rate

background investigation

background map

hydra universal rail launcher (HURL)

universal engineer tractor

universal transverse Mercator grid

general universal military service

Universal Military Training (UMT)

joint universal lessons learned

universal radar tracker

constant velocity universal joint

universal coupling

universal engine stand

universal grease

universal mount

universal tank