five-step elevator

five-by-five

goose-step / goose-stepping / goose step

oh five-hundred (5:00 am)

five-chambered arm

five-blade main rotor

GOTWA five point contingency plan (Going, Others, Time, What, Actions)

Five Eyes  (FVEY)

five-point harness

deck-edge elevator

antiaircraft elevator

aerodynamically-balanced elevator

balanced elevator

pneumatic elevator

sensitivity of an elevator

elevator control

launcher-elevator

elevator-launcher

elevator (ELEV)

fighting step

steppe (step)

step-up

decisive step

out of step

assembly step

disassembly step

folding step

four-step stand

kick step

stair step

emergency exit step up

step climb

step-down transformer