swinging gate principle

swinging traverse

away-from-home manning principle

operating principle

quantity-distance principle

territorial principle

principle of collective responsibility

principle of defense sufficiency

principle of solidarity

principle of subsidiarity

principle of territorial integrity

fire-out-of-battery principle

blowback principle

Archimedes principle

generalized Archimedes principle

principle of conservation of mass

principle of conservation of momentum

principle of energy equipartition

principle of persistence of circulation

principle of persistence of irrotational flow

principle of solidification

Stevin principle

simplicity principle of war

pooling principle

boom barrier (boom gate)

gate sentry

stern gate

boom gate

visible gate

flux gate detector

gyro flux(-)gate compass

gyro stabilized flux(-)gate compass

gate change