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1·The speed of soil delivering and resistance of auger drill are analyzed theoretically and their formulae are presented.

对螺旋钻具输土速度与阻力进行理论分析，给出了输土速度公式和阻力公式。

2·Combined with engineering example the characteristics of auger drill and construction defects for special strata are discussed.

结合工程实例，论证了旋挖钻机的特点及在特殊地层的施工缺陷。

3·Based on the machine development, a research and analyses of auger drill bits with different kinds of drill tips and soil cut blade angles were carried out in tree planting field.

在设备研制成功的基础上，对钻孔机钻头不同钻尖、不同切土刀刃角进行了实地试验研究和分析。

4·An analysis related to various kinds of soil cutting by earth auger, this paper puts forward that running speed of frill should be faster than critical speed so as to increase the efficiency of drill.

通过分析长螺旋钻机在切削各类土质时，钻具的角速度与土块运动机理关系，提出确定钻具临界的方法，而工程施工中钻杆的实际转速应大于临界转速，以提高钻机的工作效率。

5·To reproduce or increase the size of a hole by use of a drill, auger or rotary cutting tool.

用钻头，螺钻或旋转切割机在加工或增大孔的大小。

6·Currently has a long auger, lime machine, High Pressure Jet Drilling Rig, strong drill Roofbolter more than 10 varieties of five series.

目前已形成长螺旋钻机、灰土桩机、高压旋喷钻机、强冲钻机、锚杆钻机五大系列10多个品种。

7·Methods Randomly selecting severely intracerebral hemorrhagic cases that were proper to hematoma puncture. Using auger to drill into brain, then drawing and aspirating the hematoma.

方法随机选择有适应症的重症脑出血病例，随机选择两种方法之一行血肿穿刺治疗。