Assemble drill to break through the first layer of crust, the crew deploys a steel pipe with an 11-inch-wide drill bit at the bottom.
为了突破第一层地壳，船员们使用底部装有11英寸宽的钻头的钢管。
This year, a huge circular bore is to be lowered into a layer of sand deep beneath the city, where it will drill a tunnel to link them.
今年，就要在城市地下深处的砂层打通一个巨大的圆形隧道，把地铁站连起来。
Drill past 3, 000 metres of rock and you will hit a layer of salt 2, 140m thick.
钻探头穿过3000米厚的岩层将会触碰到2140米厚的盐层。
In the paper, a new working layer structure of diamond core drill for solving the problem is introduced which can increase the efficiency and the working life of the drilling tool.
文章介绍了金刚石钻孔工具一种新的工作层结构，该结构可以有效解决钻孔工具排粉散热难问题，提高钻孔工具的工作效率，延长钻孔工具的使用寿命。
Uncut layers in front of drill is called remaining layer, and its distribution of stiffness is the key factor to determine the delamination shapes of the interplies.
将钻头前端未切削的工件材料部分定义为叠合层，指出叠合层的刚度分布情况是决定各个层间分层形状的关键因素。
Is the stack height, maximum hit per drill bit, and feeds and speeds as a function of laminate type, board thickness, layer count and hole size controlled properly?
堆叠高度，每钻咀的最大钻次，进刀速度是否对板材类型，板厚，曾数，与孔尺寸进行管控？
The process, features, performance of infiltrated layer and its application to rock drill of QPQ Combined Salt Bath Treatment Technology are described in the article.
文章介绍了QPQ盐浴复合处理技术的工艺方法、特点、渗层性能及在凿岩机上的应用情况。
The process, features, performance of infiltrated layer and its application to rock drill of QPQ Combined Salt Bath Treatment Technology are described in the article.
文章介绍了QPQ盐浴复合处理技术的工艺方法、特点、渗层性能及在凿岩机上的应用情况。
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