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发明名称
SPREIZRING FUER KOLBENRINGE
摘要
申请公布号
DE1952890(B2)
申请公布日期
1972.02.17
申请号
DE19691952890
申请日期
1969.10.21
申请人
发明人
分类号
F16J9/06;(IPC1-7):F16J9/20
主分类号
F16J9/06
代理机构
代理人
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地址
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