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