The invention relates to an improvement method of a core rod of a metal rolled tube, in particular to a hollow core rod used for a planetary rolling mill.

本发明涉及一种金属轧制管的芯棒改进方法，具体地说是一种行星轧机用空芯棒。

Stainless steel customers demanding stainless steel in a more finished state such as tubing, pipe, and cold-rolled strip from rerollers and tube makers.

不锈钢客户要求不锈钢的处理尽善尽美，如管子，来自于制管者及再轧机的冷轧带。

The bimetallic rolled finned tube high pressure air cooler is applied in first time on diesel hydrogenated unit of Jinan refinery.

双金属轧制翅片管高压空冷器首次用于济南炼油厂柴油加氢装置。

The square and rectangular tube of handling container by SPA-H strip can be meet the requirement of custom, and same assortment hot rolled coil strip can be replaced by it.

用该钢带制造的集装箱方矩形焊管完全可满足用户要求，可替代同品种的热轧卷板。

The general occurrence and distribution of internal surface hollow and hole defect of hot continuous rolled seamless tube are introduced.

介绍了热连轧无缝钢管内表面凹坑、孔洞缺陷的基本形式和分布规律。