機器
canal
clip
connection
connector
construction
design
element
engineering
equipment
faucet
flat
gas
gasoline
icon
illustration
industrial
industry
infographic
irrigation
leaking
metal
oil
order
part
pipe
pipelaying
pipeline
pipework
pressure
purification
purified
repairing
set
sewage
sewer
silhouette
speedometer
symbol
tap
technology
tool
tube
tubing
vacuum
valve
wastewater
water
wheel