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公开(公告)号：US661201A
公开(公告)日：1900-11-06
申请号：US1900019933
申请日：1900-06-11
Applicant: WALTER ROTHSCHILD , GERALD DUDLEY SMITH , WILDING JAMES ARMSTRONG
Inventor： WILDING JAMES ARMSTRONG
CPC classification number: F41A9/79
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