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