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公开(公告)号：US3325877A
公开(公告)日：1967-06-20
申请号：US50994865
申请日：1965-11-26
Applicant: STORA KOPPARBERGS BERGSLAGS AB
Inventor： LENNART JONSSON STIG EVERT
IPC: B23B27/16
CPC classification number: B23B27/167 , Y10T407/118 , Y10T407/2282 , Y10T407/23
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