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This paper describes the determination methods on main parameters of blast - hole drill.
介绍了牙轮钻机主参数的选择方法.
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By two hands a cave, and a bridge, cheeper line up from the hole drill.
由两个人双手相搭成桥状, 作为“山洞”, 幼儿排队依次从洞下钻过.
The application of finite element method in torsion calculating of deep hole drill is introduced.
介绍了有限元法在深孔钻头扭转计算中的应用.
Inthe author synthetically analysed the present situation and development tread of - hole drill home and abroad.
综合分析了国内外牙轮钻机的现状及发展趋势.
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