英文關鍵字
industrial
technology
pipeline
construction
industry
heat
engineering
pipe
metal
system
steel
equipment
electric
work
machine
tube
valve
energy
manufacture
water
factory
power
building
tool
pressure
pump
room
station
control
gas
gauge
interior
electrical
piping
steam
boiler
heating
iron
production
science
house
maintenance
hydraulic
line
repair
air
cold
technical
cooling
heater