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发明名称
PRESSURE RESISTING SEAL
摘要
申请公布号
CA839598(A)
申请公布日期
1970.04.21
申请号
CAD839598
申请日期
申请人
NATIONAL RESEARCH DEVELOPMENT CORPORATION
发明人
LESLIE A. HOPKINS;BENJAMIN L. HARRIS
分类号
主分类号
代理机构
代理人
主权项
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