b22

The rolling technological specialities and rolling pass design of producing hexagon hollow drill steels ( B22 ) are introduced . Experience has been accumulated for later production of other sizes and standards .

介绍了轧制六角中空钢（B22）的主要轧制工艺特点及孔型系统，为以后生产其它规格的中空钢积累经验。

In doing so , biosurfactants generated from high efficient degradation bacteria B2020 and B22 are added to soil polluted by oil , with compound fertilizer as nutritive material and diesel as substrate .

方法将高效降解菌B2020以及B22发酵产生的生物表面活性剂加入稠油污染土壤，再施用复合肥和柴油补充土壤中的营养物质和代谢底物，分析微生物-植物联合修复的效果。

1992 " Revelation of Bronze B20 . B21 . B22 " shown at the UNESCO United Nations-sponsored24th International Arts Festival in Garnier , France ; won the exhibition award .

1992年《青铜的启示&B20.B21.B22》参加联合国科教文组织主办的“24届国际艺术节”于法国戛纳，获展览奖；