英文關鍵字
black
clay
construction
dirty
ditch
engineering
equipment
gas
industry
land
long
new
open
outdoors
pipe
pipeline
plastic
polypropylene
power
repairing
road
site
straight
tiein
trench
tube
underground
well
英文關鍵字
black
clay
construction
dirty
ditch
engineering
equipment
gas
industry
land
long
new
open
outdoors
pipe
pipeline
plastic
polypropylene
power
repairing
road
site
straight
tiein
trench
tube
underground
well