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
piping
heating
cooling
interior
maintenance
electrical
boiler
science
iron
house
line
cold
production
hydraulic
repair
gauge
steam
air
heater
technical