branch pipe welded directly to the run pipe
copper pipe and aluminum pipe
welding part of copper pipe and low corbon steel pipe
diversion tunnel and spillway tunnel
option of separate highway tunnel and Metro tunnel
railway tunnel under crossing the highway tunnel
Shield Tunnel and Rock Tunnel
water tunnel and salt tunnel
(Slight) stretch pipe reducing mill
1Cr18Ni9T stainless steel pipe
1Cr18Ni9Ti heat exchange pipe
2-roll Rotary-rolling Pipe Mill
304 stainless steel pipe