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发明名称
ROHRDURCHFUEHRVORRICHTUNG FUER BETONDAECHER.
摘要
申请公布号
DE1964886(U)
申请公布日期
1967.07.27
申请号
DE1967B069585U
申请日期
1967.01.26
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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