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