英文關鍵字
actions
amphibious
armed
armor
armored
armour
armoured
army
assault
barrier
basin
caterpillar
combat
crawler
defence
equipment
exercises
firing
floating
floats
ground
industry
landing
lightweight
machine
maneuvers
martial
military
modern
oudoors
passes
pond
pool
protected
range
reservoir
security
test
through
track
transport
transportation
troop
vehicle
vehicles
war
water
weapon