球墨铸铁管
nodular cast iron tube
ductile cast iron pipe
nodular cast iron pipe
nodular cast iron pipes
ductile cast-iron pipe
Nodular graphite cast iron tube
ductile iron pipe
nodular iron pipe
ductile iron pipes
Ferrite-ductile iron pipe
Nodular graphite iron pipe
pipe of S G cast iron
离心铸铁管
centrifugal cast iron pipe
spun iron pipe
球铁管
nodular iron pipe
ductile iron pipe
ductile iron pipes
iron casting pipe
Spherical Graphite Cast lron Pipe
承插式铸铁管
spipot and socket cast-iron pipe
球墨铸铁管(铸管)
spheroidal cast iron pipe
内螺纹外翅片铸铁管
Casting tube with female screw and side fins