1976年初,贵州第八普查勘探大队曾因3DH-250-C型钻机大钩轴承的滚柱破碎后,没有配件更换而被迫停钻。大队修配车间职工急生产之所急,精心细致地加工成功了这种液柱(φ32、长15及45),使井队迅速恢复生产。经过修复的731—2500轴承,已使用十个月始终工作正常,目前仍在继续使 In early 1976, Guizhou eighth survey census brigade had 3DH-250-C-type hook roller bearings broken, no replacement parts and was forced to stop drilling. Brigade repairs the urgent needs of the workshop staff urgently and meticulously processed the liquid column (φ32, length 15 and 45), so that the rapid recovery of the production team. After the repair of 731-2500 bearings, has been using the ten months has been working properly, is still continuing to make