英文關鍵字
waste
factory
manufactory
sludge
treatment
pollution
facility
environment
dirty
biomass
chemical
distillery
flow
reuse
liquid
circle
storage
water
sewage
filtration
sustainability
reservoir
cleaning
sanitation
cistern
clearing
purification
drain
industry
pipe
wastewater
pool
utility
sewer
processing
system
recycle
filter
supply
tank
pumping
drainage
technology
plant
ecology
garbage