英文關鍵字
abstract
backgrounds
barrel
building
bundle
business
circle
construction
development
drain
empty
equipment
industrial
industry
orange
pipe
pipeline
plastic
pvc
sewage
sewer
stack
storage
technology
tube
water
英文關鍵字
abstract
backgrounds
barrel
building
bundle
business
circle
construction
development
drain
empty
equipment
industrial
industry
orange
pipe
pipeline
plastic
pvc
sewage
sewer
stack
storage
technology
tube
water