钻头采用锰钢制造，经过特殊加工处理，适用于各种地质环境。
Bit using manganese steel manufacturing, through special processing, are suitable for all kinds of geological environment.
分析了微小孔钻头轴向振动入钻时特殊的动力学行为及其对入钻定位误差的修正作用。
This paper analyses the special dynamic behavior of entering drilling of micro drill with vibration in the direction of axis and its correction function to location error of entering drilling.
根据科学钻探对岩心的特殊要求，认为金刚石取心钻头是科学深钻取心钻进较理想的选择。
Diamond core bit is preferred for coring operation in terms of the special requirements of scientific drilling.
针对侏罗系地层高硬度、强研磨性等特点，研究并试验了几种特殊类型的钻头。
Considering the characteristics of high degree of hardness, abrasion and high temperature of Jurassic layer, some special bits were investigated and applied.
针对侏罗系地层高硬度、强研磨性等特点，研究并试验了几种特殊类型的钻头。
Considering the characteristics of high degree of hardness, abrasion and high temperature of Jurassic layer, some special bits were investigated and applied.
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