служба загородження доріг
cylinder block (engine block)
feed block slide (feed-block-actuating slide)
road block
breaching a mine road block
hairpin-type road block
high road; high-road
service road boundary lines
observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)
block and pulley
block and withdraw
branch (military/service branch, armed service)
separate from active service / the service
Y service (Y-service) / Y-station
regional meteorological service/ regional weather service (RWS)
emergency service / emergency operations service
antiboat obstacle
antipersonnel obstacle
antipersonnel obstacle breaching system (APOBS)
antitank obstacle
antivehicular obstacle
artificial obstacle
barbed wire obstacle
beach obstacle
composite obstacle
concrete obstacle
demolish an obstacle
incendiary obstacle
log obstacle
man-made obstacle
mine obstacle
natural obstacle