英文關鍵字
boiler
cable
chemical
cleaning
clock
closeup
compressor
connection
control
detail
device
dial
electric
electrical
energy
engine
equipment
factory
fuel
gage
gas
gasoline
house
indication
industrial
industry
installation
interior
line
machine
maximum
membrane
meter
motor
oil
parts
pipe
pipeline
piping
plant
pressure
reading
refinery
safety
technological
tools
tubing
unit
valve
water