(мор.) чотиритактний двигун
four-cycle / four-stroke
four by four
fingertip formation / finger-four formation / four finger formation
four-stroke cycle
two-stroke engine
engine capacity / engine power, engine output
four-point barb
four-charge gun
four by two
four-barreled anti-aircraft gun
four-groove barrel
four-point
four-stage compressor
four-way valve
four-wheel drive
four-wheel drive truck
four-boss breaker cam
four-step stand
Four Tonner (Bedford truck)
power stroke
recoil stroke
stroke
ascending stroke
bottom end of stroke
back stroke
expansion stroke
impact stroke
operating rod stroke
recovery stroke
shock strut stroke
spring stroke
compression stroke