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发明名称
Mud drum seal
摘要
申请公布号
US1900019(A)
申请公布日期
1933.03.07
申请号
US19310578010
申请日期
1931.11.30
申请人
MICHAEL LIPTAK
发明人
LIPTAK MICHAEL
分类号
F22B37/00
主分类号
F22B37/00
代理机构
代理人
主权项
地址
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