шлагбаум
boom gate
gate sentry
stern gate
visible gate
flux gate detector
gyro flux(-)gate compass
gyro stabilized flux(-)gate compass
gate change
gate
gate a target in range
gate pulser
narrow gate
narrow gate pulse
narrow-narrow gate
narrow-narrow gate pulse
sea chest gate valve
swinging gate principle
altitude barrier
antisubmarine barrier
barrier materials
barrier minefield
barrier plan
barrier restricted area
barrier system
barrier troops / blocking detachments (units) / anti-retreat forces
concrete barrier
portable vehicle-arresting barrier (PVAB)
sonic barrier
vehicle-arresting barrier
barrier inspection
crash barrier
noise barrier