機器
admission line
air conditioner
air conduit
air duct
air valve
architecture
ascending pipe line
bagpipe
building feature
cable duct
ceiling
climate control
conduit
corrugated iron
design
discharge piping
distributing
engineering
exploration
factory
fuel and power generation
gasoline
industry
line
machine part
manifold
metal
metallic
office
oil industry
pipe
pipeline
piping
power
refinery
riser
rising piping
silver
stainless steel
steel
technology
tube
tubing