The Rock Tooth Problems 罗克看牙医
Some little things become big: a tooth would beat a piece of rock, a Nile crocodile killed a mouse, with a handle of the sword would kill a whale.
有些小事往往变成大事：一颗牙齿会战胜一块岩石，一只尼罗河的老鼠会杀掉一条鳄鱼，一把带柄的剑会杀掉一条鲸鱼。
Insert tooth bit applies in every serious geography especially hard rock; it has stable drilling speed and can drill the hardness of rock at 1-6 grades.
镶齿牙轮钻头主要适用于地质较硬的岩层，它钻进速度稳定，可以钻进1-6级地质硬度，适用于各种恶劣的地质环境。
The geometric configuration, moving conditions and force conditions of the tooth surface and the process of rock disintegration must be studied in designing the cutting structure.
欲设计合理的齿面结构必须研究齿面的几何形状、运动状态、受力状态和岩石破碎过程。
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