機器
antique
bar
boiler
bolts
brass
bright
clock
compressor
design
dial
energy
engine
engineering
equipment
flow
frame
gas
gauge
heating
indication
industrial
industry
instrument
isolated
level
machinery
manometer
measure
measurement
measuring
mechanical
metal
metallic
meter
nuts
object
old
power
pressure
retro
revolution
rusty
steam
system
technology
valve
vintage
wet
white