road block and obstacle service

cylinder block (engine block)

feed block slide (feed-block-actuating slide)

breaching a mine road block

hairpin-type road block

road block

unmanned 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

block diagram

block face

block supplies

locking block

TNT block

breech block pivoted below the level of the chamber

disrupt, fix, turn or block the enemy force

all-round vision block

back on the block

block off

direct vision block

surveillance vision block

trunnion block

vision block

advanced building-block for large-area exploitation

basic building block