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发明名称
ROHRDURCHFUEHRUNG FUER BETONDAECHER.
摘要
申请公布号
DE1956483(U)
申请公布日期
1967.03.02
申请号
DE1966B068774U
申请日期
1966.11.30
申请人
JOHANNES VAN BERKEL
发明人
JOHANNES VAN BERKEL
分类号
F16L5/02
主分类号
F16L5/02
代理机构
代理人
主权项
地址
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