英文關鍵字
artesian
cement
circle
circles
concrete
construction
development
drainage
draw
engineering
equipment
hole
industry
material
pipe
ring
round
sanitary
septic
sewage
sewer
tube
tunnel
warehouse
water
well
英文關鍵字
artesian
cement
circle
circles
concrete
construction
development
drainage
draw
engineering
equipment
hole
industry
material
pipe
ring
round
sanitary
septic
sewage
sewer
tube
tunnel
warehouse
water
well