機器
automobile
black
car
chain
closeup
connection
construction
dark
design
detail
direction
dirty
dynamic
engine
engineering
equipment
factory
heavy
hook
industrial
industry
iron
lift
maintenance
mechanic
mechanical
metal
occupation
old
person
power
pulling
reel
repair
rusty
safety
security
service
shop
stain
steel
strong
tool
transportation
wheel
work
worker
workplace
workshop