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发明名称
Procédé permettant d'accroître la résistance à l'usure des tubes ou tuyaux de remblayage
摘要
申请公布号
FR986261(A)
申请公布日期
1951.07.30
申请号
FRD986261
申请日期
1949.05.17
申请人
发明人
GERLACH KARL;BU:HLER HANS
分类号
C21D9/08
主分类号
C21D9/08
代理机构
代理人
主权项
地址
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