The deep well coal road cable of small diameter hole and high pre-tension structure and craft were studied according to the condition of high stress and composite roof in Fengcheng coal field.
结合丰城矿区高地应力、合顶板等复杂地质条件,研究深井条件下煤巷锚索采用小孔径、加高预应力的结构形式和施工工艺。
He had helped to craft the START I treaty and had played a key role in the legislation that reorganized and strengthened the military command structure in the 1980s.
他帮助构思了《第一阶段削减战略武器条约》,在80年代重新组织和加强军事指挥结构的立法中起了关键作用。
This text introduced molecular structure and performance of modified BMI resin, and mould pressing craft of the composite material.
本文介绍了改性双马来酰亚胺树脂的分子结构与性能,及复合材料的模压成型工艺。
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