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