CSN 22 2504-1973 Gear cutting tools Straight toothed rack-shaped involute gear cutters Basic rules《渐开线齿轮用直牙架状铣刀 基本规程》.pdf

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CSN 22 2540-1973 Straight toothed rack shaped cutters for involute gearing Pressure angle alpha = 20 degrees《渐开线齿轮用直牙架状铣刀 20压力角》.pdf

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