стукіт, що розрізняється на слух
audible alarm
audible tone
audible warning
knock a tank
big-end knock
borderline knock curve
engine knock / knocking
high-knock rating gasoline
knock detection by ear
knock indicator
knock off balance
knock tendency
knock test of gasoline
knock-down power
knock-free operation
knock-meter
knock characteristic (of gasoline)
knock-free fuel
knock-down fence
knock out of action
knock out of the war