英文關鍵字
background
boiler
bowl
chemical
chemistry
cistern
cold
concern
construction
dairy
duct
energy
engineering
factory
filter
filtering
food
gas
industry
line
machine
manometer
manufactory
manufacturing
milk
mill
modern
monitoring
oil
pasteurization
pipe
pipeline
piping
plant
power
production
pump
reservoir
shiny
stainless
steel
system
tank
technology
tub
tube
vat
works
workshop