機器
aged
air
bar
closeup
compression
control
design
detail
detector
device
display
energy
engineering
equipment
gauge
heat
hydraulic
indication
indicator
industrial
industry
instrument
manometer
measure
measurement
metal
meter
metering
nobody
object
old
power
pressure
retro
round
science
steel
system
technical
technology
tester
tool
unit
used
vacuum
valve
vintage
water