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公开(公告)号:US1212006A
公开(公告)日:1917-01-09
申请号:US573315
申请日:1915-02-02
Applicant: BIRKY CHRIS
Inventor: BIRKY CHRIS
CPC classification number: E03C2201/90
公开(公告)号:US1212006A
公开(公告)日:1917-01-09
申请号:US573315
申请日:1915-02-02
Applicant: BIRKY CHRIS
Inventor: BIRKY CHRIS
CPC classification number: E03C2201/90