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发明名称
IMPROVEMENTS IN SCRAPERS
摘要
申请公布号
ZA7107704(B)
申请公布日期
1972.11.29
申请号
ZA19710007704
申请日期
1971.11.16
申请人
WELKOM ENG LTD
发明人
THORBURN P;O RORKE B
分类号
E02F
主分类号
E02F
代理机构
代理人
主权项
地址
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