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发明名称
Pfahl aus einzelnen uebereinandergesetzten zapfen- und nabenartig ineinandergreifenden Hohlkoerpern
摘要
申请公布号
DE534040(C)
申请公布日期
1931.09.22
申请号
DE1928ST45164D
申请日期
1928.12.12
申请人
MARTINUS JOAENNES STAM
发明人
分类号
E04H12/16
主分类号
E04H12/16
代理机构
代理人
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