високооктанове паливо
knock-free operation
accident-free flying / mishap-free flying
mishap-free flying / accident-free flying
lead-free fuel
knock a tank
audible knock
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-meter
knock characteristic (of gasoline)
knock-down fence
knock out of action
knock out of the war
Proton Exchange Membrane Fuel Cell (PEM fuel cell, PEMFC)
contact-free war
contamination-free
fallout-free
free fall
free fall air drop
free fire zone
free mine
free naval control of shipping
free net
free neutron