英文關鍵字
bacteria
big
clean
concrete
construction
ecology
engineering
equipment
facility
factory
filter
generator
heavy
huge
industrial
industry
inside
machine
machinery
manufacturing
metal
metallic
pipe
pipeline
piping
pollution
pressure
process
processing
pump
purification
purified
purity
reservoir
stainless
steel
storage
structure
system
tank
technology
treatment
tube
valve
wastewater
water