機器
antique
background
bearing
black
blower
detail
dirty
engine room
engineering
equipment
exhaust
freight
hatch
heavy
historical
industrial
industry
iron
ladder
machinery
mechanic
mechanical
metal
obsolete
oil
old
part
physics
pipes
power
powerful
powerstation
powertrain
pump
retro
room
rusty
ship
shipping
steel
submarine
system
technical
technology
transportation
vehicle
vintage
was
work