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发明名称
Verfahren und Vorrichtung zum Reinigen von Schnecken
摘要
申请公布号
DE1813191(A1)
申请公布日期
1969.08.21
申请号
DE19681813191
申请日期
1968.12.06
申请人
RAYMOND INTERNATIONAL INC.
发明人
MALVERN MCCALL,HAROLD
分类号
E21B12/06
主分类号
E21B12/06
代理机构
代理人
主权项
地址
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