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我厅在大姚地质队召开的钻探、山地、机械现场会议上。交流了大跃进以来群众创造的先进经验，现将其中几个介绍如下：一、废钻粒钻头和废合金钻头改制成元钻头十二地质队在大战千米的生产高潮中，利用废钻粒钻头和废合金钻头改制元钻头试验成功，并先后制成了2500个，保证了生产的需要，同时给国家积累了财富两万元以上。1．废钻粒钻头改制成元钻头的工艺过程。将磨损严重而又过短的废钻粒钻头（如图1）切
My hall in Dayao geological team held drilling, mountain, mechanical field meeting. Exchanged the advanced experiences created by the masses since the Great Leap Forward and introduced a few of them as follows: I. Waste Drill Bits and Waste Alloy Bits Reformed into Yuan Bits 12 Geological Corps In the climax of World War I, the use of waste drill bits Drill bit and waste alloy drill bit conversion experiment successful, and has made a 2500, to ensure the production needs, while the country has accumulated more than 20,000 yuan in wealth. 1. Waste drill bit into a yuan bit drilling process. Will wear serious and too short waste drill bits (Figure 1) cut