【摘要】 对国外凿岩工程中液压凿岩钻车用钎具产品的品种和选择方式进行了论述，简述了国外钎具产品的生产过程，并对我国钎钢钎具行业的生产现状提出了几点想法。更多还原

【Abstract】 The paper expounds the kinds and selection of the bits for hydraulic drill jumbo, and briefly describes the manufacturing procedure of the bits at abroad. The paper also puts forward some thoughts on production state of the bit steel and bit industry at home.更多还原