X70 grade steel for line pipe  X70钢级管线钢

butt welding for steel pipe  钢管对接

grade X70 line pipe steel  X70级管线钢

high grade pipe line steel  高钢级管线钢

HIGH-PERFORMANCE PIPE LINE STEEL  高性能管线钢

high-pressureno gas spraying for steel pipe  钢管内高压无气喷涂

L360 Pipe Line Steel  L360管线钢

LINE PIPE STEEL  管线钢

Pipe Line Steel  管线钢; 管道钢

Pipe-Line Steel  管线钢

plate steel for pipe-making  管线板材

Seamless steel pipe for petroleum cracking service  石油裂化用无缝钢管

slight expansion concrete for steel pipe  钢管微膨胀混凝土

steel pipe for transmitting water  成品输水钢管

steel pipe for transporting oil and gas  油气输送钢管

steel pipe for water transmission  输水钢管

the line for steel bar  棒材生产线

X65 pipe line steel  X65管线钢

X65 pipe-line steel  X65管线钢