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经营范围
发明名称
Vorrichtung zum Entfernen des Steinansatzes in Rohren, z. B. von Schachtleitungen inBergwerken
摘要
申请公布号
DE563279(C)
申请公布日期
1932.11.03
申请号
DE1931K119296D
申请日期
1931.03.06
申请人
FRITZ KOETTER
发明人
分类号
B08B9/04;E21B37/02
主分类号
B08B9/04
代理机构
代理人
主权项
地址
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