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