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发明名称
ABSPERRORGAN FUER BOHRHAEMMER.
摘要
申请公布号
DE1756307(U)
申请公布日期
1957.11.21
申请号
DE195600H1964U
申请日期
1956.06.11
申请人
GUENTHER HECKMANN;HEINZ HOETTEN
发明人
GUENTHER HECKMANN;HEINZ HOETTEN
分类号
E21B1/30
主分类号
E21B1/30
代理机构
代理人
主权项
地址
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