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公开(公告)号：US3029198A
公开(公告)日：1962-04-10
申请号：US68608957
申请日：1957-09-25
Applicant: ANDERSON WILLIAM F , SHIMAZAKI THOMAS T , STELLE ALLEN M , TELLEFSON DOUGLAS R
Inventor： ANDERSON WILLIAM F , SHIMAZAKI THOMAS T , STELLE ALLEN M , TELLEFSON DOUGLAS R
IPC: G21C3/36
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