英文關鍵字
bacteria
boiler
chemical
clean
control
cylinder
ecology
environment
equipment
faucet
filter
filtering
filtration
flow
indoor
industrial
industry
iron
knob
liquid
machine
metal
microfiltration
modern
oxygen
panorama
pipe
pipeline
piping
plant
power
preparation
process
processing
purification
reservoir
room
scientific
steel
step
storage
system
tank
technology
tool
treatment
tube
valve
waste
water