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发明名称
Obturator
摘要
申请公布号
US2942525(A)
申请公布日期
1960.06.28
申请号
US19450596931
申请日期
1945.05.31
申请人
GILLMAN JR JOSEPH L
发明人
JR. JOSEPH L. GILLMAN,
分类号
F41A3/74
主分类号
F41A3/74
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