The optimum design of impact drilling machinetower system can be developed based on the data and result.
以上计算和分析的结果，对冲击钻机钻塔系统优化设计具有实际应用价值。
2
The characteristic and mechanism of impact drilling machine are introduced followed by the summary of the present status of impact drilling machinetower researches at home and abroad.
本文首先介绍了冲击钻机的特点及工作原理，综述了国内外冲击钻机塔架的研究现状。
3
The article talks about crank crack of shearing machine caused by flakes through testing tower-shaped texture and fracture, dipping in less-acid solution and analyzing its microstructure.