1) straight-keeping drill combination
钻孔保直
2) drilling hole diameter
钻孔直径
1.
Through theoretical analysis and experimental data,the effect of matching between piled anchor and drilling hole diameter on anchoring strength was described,and the most reasonable matching parameters of anchor diameter with drilling hole diameter were given.
通过理论分析和实验数据论述了锚杆与钻孔直径匹配对锚固强度的影响,并给出了锚杆直径与钻孔直径最合理的匹配参数。
3) borehole perpendicularity
钻孔垂直度
4) great diameter perforate
大直径钻孔
1.
According to Yangquan coal miningpractice, launches the application study that the great diameter perforate substituted with the trough to traverse into technology in opening, and popularizes and applies to gas drainage from adjacent layer.
针对阳泉煤业集团某矿实际,开展大直径钻孔替代顺槽横贯成孔工艺的应用研究,推广应用于邻近地层瓦斯抽放孔的施工工程中,为高瓦斯矿的瓦斯抽放寻找一种新的技术途径。
5) tap-drill size
螺孔钻直径
6) fluted drill
直槽扩孔钻
补充资料：甪直保圣寺塑像
见保圣寺罗汉塑像。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条