英文關鍵字
abstract
black
concepts
condensation
effect
energy
equipment
fuel
gas
heat
ideas
industry
metal
motion
moving
objects
pipe
pipeline
power
pressure
pump
shape
smoke
steam
steel
swirl
technology
tube
valve
英文關鍵字
abstract
black
concepts
condensation
effect
energy
equipment
fuel
gas
heat
ideas
industry
metal
motion
moving
objects
pipe
pipeline
power
pressure
pump
shape
smoke
steam
steel
swirl
technology
tube
valve