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1949年以来,风腿凿岩在国外逐渐得到重视和发展,使采掘技术发生很大变化。风腿的特点是轻便、所占空间小、架设和拆除快,因而可延长钝凿岩时间,一个凿岩工可操纵两、三台或更多的凿岩机。风动上向伸缩式凿岩机和上述风腿凿岩机,在国外常采用22毫米六
Since 1949, the wind-legged rock drilling has been gradually valued and developed in foreign countries, which has greatly changed the mining technology. Wind legs are characterized by light weight, small footprint, fast erection and removal, which prolongs the blunt rock drilling time, and a single rock drill can handle two, three or more rock drills. Pneumatic upward retractable rock drill and the above-mentioned wind-leg rock drill, often abroad 22 mm six