英文關鍵字
background
bowl
chemistry
cistern
closeup
cold
conduit
container
cooling
dairy
depth
dof
energy
engineering
factory
focus
gas
hot
industry
line
machine
manifold
manometer
manufactory
manufacturing
modern
oil
pipe
pipeline
piping
plant
power
pressure
pump
refinery
reservoir
stainless
system
tank
tub
tube
undertaking
vat
water
works
workshop