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