摘要
对迈步式扩孔钻头迈步的实现、大小钻头直径比的确定及其应用前景分别进行了论述.
The author discusses the actualization of innovation ream bit, diameters ration decision of between large drill & small one and perspective of innovation ream bit: P9~11
出处
《矿山机械》
北大核心
1996年第9期9-11,5-6,共3页
Mining & Processing Equipment
