(ав.) легкозмінний блок / швидкозмінний блок; конструктивно-змінний блок
laser recorder unit (LRU)
laser relay unit (LRU)
copper-lead replaceable-type bearing
deployment line; line of deployment (LD); line of departure
observer-target line (OT line)
scheme trail line (tag line)
battery coolant unit / battery-coolant unit (BCU)
gear reduction unit / gear-reduction unit
position and navigation unit / position navigation unit (PNU)
pinch (a unit) out of a large unit
armistice demarcation line
beyond line-of-sight (BLOS)
bulk distribution line
cease-fire line (CFL)
combat outpost line
confrontation line
contact line
contamination control line
contour line (contour)
county line
defensive belt / line
delivery line (pipeline)
demarcation line
dismount line
distant early warning line
drive line / drive (propeller) shaft
final coordination line
final protective line (FPL)
fire support coordination line (FSCL)
firing line
first-line reserve
formation in line