機器
action
background
business
close up
equipment
factory
gear
gunpowder
helmet
industrial
industry
instrument
iron
job
lead
light
maintenance
man
manufacturing
mechanical
metal
miniature
model
naive
object
people
plastic
play
power
production
professional
repair
repairman
revolver
safety
scarce
scene
service
small
steel
system
team
technology
tool
vehicle
wastage
work
worker
workshop