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苏联特殊生产工艺局研制了一种装配式硬质合金滚刀(图a),这种滚刀适用于粗加工和半精加工m=1.5~4.0毫米钢制齿轮(30XCA号
Soviet Union Special Production Technology Bureau has developed a carbide hob assembly (Figure a), this hob is suitable for roughing and semi-finishing m = 1.5 ~ 4.0 mm steel gear (30XCA number