在批林批孔运动普及、深入、持久发展的大好形势下,遵照伟大领袖毛主席关于“我们必须打破常规,尽量采用先进技术……”的教导,我队于一九七四年大力进行了新品种金刚石钻头和扩孔器的试验。在各级领导的重视和各兄弟单位的支持和帮助下,试验工作取得了 Under the excellent situation of popularization, deepening and sustained development of the proletarian and baryar exploit movements, following the teachings of Chairman Mao, the great leader, on “We must break the routine and make best use of advanced technologies ...”, our team vigorously conducted in 1974 Test of new varieties of diamond bits and reamers. With the support of leaders at all levels and the fraternal units, experimental work has been achieved