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广东读者麦桂生来信说,随着硬质合金滚刀已普及,希望介绍使用这种滚刀的经验和刃磨、检测技术。
Michael Gui, a Guangdong reader, wrote from the letter saying that with the popularity of carbide hobs, we hope to introduce the experience of using this hob and the grinding and testing technology.