英文關鍵字
architecture
army
atomic
background
base
basement
bomb
bombshelter
building
bunker
cellar
cold
concrete
construction
corridor
danger
design
door
equipment
factory
industry
israel
jerusalem
laboratory
lock
metal
metro
military
nuclear
object
protection
railway
research
safety
science
secret
security
set
shelter
station
steel
storage
subway
technology
travel
tunnel
underground
wall
war