英文關鍵字
background
beverage
chemistry
cistern
cleaning
cold
construction
container
dairy
different
drink
duct
emissions
energy
engineering
equipment
factory
filtering
food
garbage
gas
hot
industry
iron
line
machine
machinery
management
manifold
manometer
manufactory
manufacturing
modern
oil
pipe
plant
power
process
processing
production
pump
reservoir
separation
separator
shiny
steel
system
tank
trumpet
tub
workshop