機器
antique
background
bearing
black
dashboard
detail
diesel
dirty
engine
engineering
equipment
exhaust
freight
heavy
historical
industrial
industry
iron
machine room
machinery
mechanic
mechanical
metal
obsolete
oil
old
part
physics
pipes
power
power station
powertrain
pump
repair
retro
room
rusty
ship
shipping
steel
system
technical
technology
transportation
vehicle
vintage
work