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发明名称
Variable choke for shotguns
摘要
申请公布号
US2134238(A)
申请公布日期
1938.10.25
申请号
US19370164243
申请日期
1937.09.16
申请人
SEDBERRY WILLIAM H
发明人
SEDBERRY WILLIAM H.
分类号
F41A21/42
主分类号
F41A21/42
代理机构
代理人
主权项
地址
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