在毛主席关于“开发矿业”光辉思想的指引下,为满足采掘工业的飞跃发展,供应充足的凿岩钻具(钎杆、钎尾、套管、针头等),我厂广大革命职工本着“独立自主,自力更生”的精神,自己动手,因陋就简,从在普通车床上改装开始到自制简易专用车床,最近在原来机床的基础上设计制造成功一台B120型12毫米波形螺纹车床,可以加工内外波形螺纹。生产实践证明:用该车床加工钻具比在普 Under the guidance of Chairman Mao on the brilliant idea of ​​“developing the mining industry”, in order to meet the rapid development of the extractive industries and to supply a sufficient number of rock drilling tools (drill rods, shaving heads, sleeves, needles, etc.) “Independent, self-reliance” spirit, do it yourself, simple, from the ordinary lathe modification to self-made simple special lathe, recently designed and manufactured on the basis of the original machine a B120 12mm wave thread lathe, can be processed inside and outside the waveform Thread. Production practice shows that: the use of the lathe processing drilling than in general