内螺纹外翅片铸铁管
Casting tube with female screw and side fins
内搪胶镀锌铁管
galvanized iron pipe with polyvinyl chloride lining
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
球墨铸铁管(铸管)
spheroidal cast iron pipe
球铁管
nodular iron pipe
ductile iron pipe
ductile iron pipes
iron casting pipe
Spherical Graphite Cast lron Pipe
水泥衬里球墨铸铁管
ductile iron pipe with cement lining
水泥衬里延性铁管
ductile iron pipe with cement lining
涂料法生产球铁管
The coating law production
无内搪层镀锌铁管
unlined galvanized iron pipe
塑料衬里镀锌铁管
galvanized iron pipe with polyvinyl chloride lining