heat flux of unit pipe length
spiral welded pipe unit
branch pipe welded directly to the run pipe
copper pipe and aluminum pipe
welding part of copper pipe and low corbon steel pipe
identical unit or proportional unit of the body
time-rock unit =time-stratigraphic unit
(Slight) stretch pipe reducing mill
1Cr18Ni9T stainless steel pipe
1Cr18Ni9Ti heat exchange pipe
2-roll Rotary-rolling Pipe Mill
304 stainless steel pipe