機器
aircraft
ammunition
anti
antiaircraft
armed
armor
army
artillery
attack
background
battle
camouflage
cannon
conflict
copy
danger
defend
defense
design
equipment
field
flak
german
green
gun
guns
halftrack
heavy
historic
history
howitzer
isolated
metal
military
model
object
old
power
retro
russian
shot
sky
steel
technology
vehicle
war
weapon
white
world