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1.发明授权Method and apparatus for progressively compressing the end portion of a wire to forma nail 失效用于逐渐压缩线的端部以形成钉子的方法和装置
公开(公告)号：US2917756A
公开(公告)日：1959-12-22
申请号：US58007956
申请日：1956-04-23
Applicant: STEARNS GERALD S , SMART GORDON E
Inventor： STEARNS GERALD S , SMART GORDON E
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