機器
ammo
ammunition
automation
belt
brass
bullet
business
closeup
conflict
copper
danger
dangerous
device
engineering
equipment
factory
firearm
gun
hunting
illustration
industrial
industry
isolated
line
machinery
machines
macro
manufacturing
material
mechanical
mechanism
metal
military
power
production
protection
rifle
shell
shiny
shot
steel
technology
tool
violence
war
weapon
white
work