论文部分内容阅读
介绍了英国Tap & Die公司的Tadco Superforge麻花钻轧制法。——编者英国伦敦TaP&Die公司获得了麻花钻及其他带螺旋槽刀具热轧方法的专利权,
Introduced Tadco Superforge twist drill rolling method of British Tap & Die company. - Editor TaP & Die, London, United Kingdom Acquired patent rights for twist drills and other hot rolling methods with helical flute knives,