Y7520W型万能螺纹磨床(图1)是我厂去年4月中旬投入试制的。由于苏联专家拉鲍基娜同志的大力帮助与热诚指导,以及全厂同志们的努力,克服了重重困难,终于在1958年底完成了我国第一台高精度Y7520W螺纹磨床的试制任务。经试用后,在该机床上用单线砂轮,磨制螺距在8毫米以内的工件时, Y7520W-type universal thread grinder (Figure 1) is our factory put into trial production in mid-April last year. Thanks to the help and guidance of the Soviet expert Comrade Rabochina and the efforts of all the comrades in the factory, many difficulties were overcome and finally the trial production task of the first high-precision Y7520W thread grinder in China was completed by the end of 1958. After the trial, the machine with a single wheel, grinding the workpiece pitch within 8 mm,