機器
circular
closeup
control
electronic
engineering
equipment
gas
gauge
hot
hydraulic
industrial
industry
instrument
landfill
measure
measurement
metal
meter
monitor
number
object
oil
old
operation
operator
part
pipeline
pointer
power
pressure
pump
range
retro
round
scale
steel
suction
symbol
system
technology
temp
temperature
thermometer
tool
valve
vintage
work