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
crack а сode
battle fatigue
operational fatigue
detonation bearing fatigue
aeronautical fatigue
airframe fatigue
corrosion fatigue
corrosion fatigue damage
fatigue life
fatigue test airframe