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发明名称
Vent seal
摘要
申请公布号
US2790389(A)
申请公布日期
1957.04.30
申请号
US19550533530
申请日期
1955.09.09
申请人
ACKERMAN JR JOSEPH I
发明人
JR. JOSEPH I. ACKERMAN,
分类号
F42B39/20
主分类号
F42B39/20
代理机构
代理人
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地址
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