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公开(公告)号:US3453442A
公开(公告)日:1969-07-01
申请号:US3453442D
申请日:1965-02-18
Applicant: BARNES ENG CO
Inventor: SPANGENBERG PETER E
CPC classification number: G01S3/789
公开(公告)号:US3453442A
公开(公告)日:1969-07-01
申请号:US3453442D
申请日:1965-02-18
Applicant: BARNES ENG CO
Inventor: SPANGENBERG PETER E
CPC classification number: G01S3/789