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公开(公告)号：US660052A
公开(公告)日：1900-10-16
申请号：US1899729103
申请日：1899-08-31
Applicant: DIGGS HARRISON A
Inventor： DIGGS HARRISON A
CPC classification number: B23B31/201 , Y10T24/4696 , Y10T279/17547
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