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