我们从一九七四年开始推广小口径金刚石钻探以来，开动钻机台数逐年增加，当时仍沿用大口径普通高压胶管，经常出现蹩断事故，并容易造成烧钻或微烧而损坏钻头和扩孔器。针对上述问题，我局各级供应和生产部门密切协作和互相支援，千方百计挖掘耐 Since we started to promote small diameter diamond drilling in 1974, the number of drilling rigs we have started to increase year by year. At that time, we were still using large-diameter ordinary high-pressure rubber hoses. We often encountered broken accidents and easily burned or burned, damaged drill bits and reaming Device. In response to the above problems, our bureau supply and production departments at all levels in close collaboration and mutual support, do everything possible to tap the endurance