英文關鍵字
3d
animation
conduit
consumption
control
counter
element
engineering
equipment
factory
faucet
flow
gauge
handle
heavy
hydrant
icon
illustration
industrial
industry
instrument
isolated
isometric
manufacturing
metal
meter
motion
petroleum
pipe
pipeline
piping
plumbing
pressure
pump
red
rotate
scale
screw
sewerage
shut
steel
system
tap
technology
thread
transit
tube
valve
water
wire