英文關鍵字
activity
build
building
business
cement
circular
concrete
connect
construction
culvert
development
ditch
drain
drainage
duct
engineering
estate
factory
high
housing
industrial
industry
irrigation
manufacturing
materials
outdoor
pile
piled
pipe
pipes
plumbing
precast
repair
road
roadn
round
sanitary
sewage
sewer
site
stack
stacked
step
storage
storm
structure
surface
system
tube
underground
vessel
warehouse
waste
water
way