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我厂在最近接受制造一批КАМ-500型钻机立轴的任务，可是由于没有机床设备及原材料（特别钻Φ54公厘的孔），给制造任务的完成带来了困难，到外单位加工订货，则时间很长，不能满足工程的需要（过去都是到外面订货），于是厂内领导便把这个问题交给职工同志们共同进行研究。铁工段的同志便提出将Φ8.9×9.5无缝钢管的内外径同时缩小来制造КАМ-
Our factory recently accepted the task of manufacturing a number of КАМ-500 drilling rig vertical shafts, but due to the lack of machine tool equipment and raw materials (in particular the drilling of Φ54 mm holes), it has brought difficulties to the completion of manufacturing tasks, and processing and ordering to foreign units, It took a long time to meet the needs of the project (in the past it was ordering outside), so the factory leaders gave this question to the comrades in the joint study. The comrades of the ironworks section proposed to reduce the inner and outer diameters of the Φ8.9×9.5 seamless steel pipe to manufacture КАМ-