утомна тріщина
fatigue duty; fatigue detail; labor detail
punishment fatigue / extra fatigue
crack defenses/the front
crack shot
crack troops
crack-through
crack tank unit
crack truck body
corrosion crack
crack detection
loaded crack
partial-thickness crack
stress corrosion crack
thermal-shock crack
surface crack detector
hairline crack / microcrack
microcrack / hairline crack
crack
crack a line
crack defenses
crack an attack
crack through the shells
battle fatigue
combat fatigue
operational fatigue
detonation bearing fatigue
aeronautical fatigue
airframe fatigue
corrosion fatigue
corrosion fatigue damage
fatigue life
fatigue test airframe