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。
It adopts high accurate auger filling system. It can automatically perform pack-making, metering, filling, sealing, cutting, counting, thermal pressing of batch number processes.
采用高精度螺杆下料的计量方式，可自动完成制袋、计量、充填、封合、分切、计数、热压批号等工序。
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。
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