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