機器
air
barometer
boiler
close
closeup
control
dial
dirty
duty
energy
engineering
equipment
factory
fix
gage
gas
gauge
hard
hardened
heavy
hydraulic
industrial
industry
instrument
iron
liquid
manometer
measure
measurement
metal
meter
metering
oil
part
pipe
power
press
pressure
pump
repair
service
steel
strength
system
tool
valve
water
work
workshop