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综述了我国近20年来天井钻机的发展概况、结构特点,所使用的扩孔刀头和刀具技术,钻进工艺与注意事项,以及在生产实践中所取得的效果。
In this paper, the development of the boring machine in the past 20 years in our country is summarized. The characteristics of the structure, the reaming tools and tools used, the drilling technology and precautions, and the results obtained in the production practice are summarized.