英文關鍵字
box
built
connection
counter
culvert
device
electrical
electricity
faucet
fittings
flow
frame
gauge
glass
hose
house
industrial
industry
instrument
intricate
investment
joint
line
linkage
measure
measurement
metal
meter
payment
pipe
pipeline
plumbing
residential
service
stopcock
supply
symmetry
tap
technology
tilt
tool
tube
urban
utility
valve
vertical
wall
water
window