通过对成品钢管各项性能的检测，分析了北方重工生产的锻造镗孔无缝钢管的产品质量和特点。
The product quality and character of boring seamless steel pipe produced by the North Heavy Industries Group Corp.
通过对成品钢管各项性能的检测，分析了北方重工生产的锻造镗孔无缝钢管的产品质量和特点。
The product quality and character of boring seamless steel pipe produced by the North Heavy Industries Group Corp.
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