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发明名称
REMOVING BROKEN MATERIAL
摘要
申请公布号
GB8516931(D0)
申请公布日期
1985.08.07
申请号
GB19850016931
申请日期
1985.07.04
申请人
VOEST-ALPINE AG
发明人
分类号
E21C35/20;E21F13/06
主分类号
E21C35/20
代理机构
代理人
主权项
地址
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