Add a new drill-through definition.
添加一个新的钻取定义。
The new drill is much more powerful, capable of cutting through up to 30m of rock a day.
新的钻机强大得多，一天能够穿透30米的岩石。如果一切进展顺利，它可能第一个完成援救通道。
Diamond cone bit is a new drill bit which make use of cutting cutters interacting with rock slowly and alternately.
轮式金刚石钻头是利用切削齿缓慢交替切削运动来破碎岩石的新型钻头。
Diamond cone bit is a new drill bit which make use of cutting cutters interacting with rock slowly and alternately.
轮式金刚石钻头是利用切削齿缓慢交替切削运动来破碎岩石的新型钻头。
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