英文關鍵字
air
automation
bacteria
barrel
boiler
chemical
clean
container
control
device
ecology
environment
equipment
faucet
filter
filtering
filtration
gage
gauge
huge
indoors
industrial
industry
line
liquid
machine
modern
new
oil
oxygen
panorama
pipe
pipeline
plant
preparation
process
processing
production
purification
purified
sludge
steel
storage
system
tank
technology
treatment
tube
valve
water