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