英文關鍵字
background
bacteria
big
bio
blue
building
chemical
chemistry
chimney
chlorine
construction
digester
distillery
dry
ecology
energy
engineering
equipment
factory
filter
flocculation
fuel
gas
generator
huge
indoor
industrial
industry
machine
metal
natural
oil
organic
panning
panorama
petrochemical
petroleum
pipe
pipeline
pipelines
piping
plant
plumbing
pollution
power
pressure
process
purification
purified
refinery
refining
reservoir
sedimentation
steel
storage
store
structure
tank
technology
tool
treatment
tube
urban
utility
view
waste
water