英文關鍵字
ammo
ammunition
arm
automation
belt
bullet
bullets
business
cartridges
closeup
computer
copper
creature
dangerous
device
engineering
equipment
factory
filled
gun
industrial
lifter
line
machine
machinery
make
manufacturing
mechanical
metal
military
modern
muscular
object
plant
power
production
robot
robotic
shot
technology
tool
war
weapon