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经营范围
发明名称
OVERLOAD DEVICE
摘要
申请公布号
ZA9003568(B)
申请公布日期
1991.02.27
申请号
ZA19900003568
申请日期
1990.05.10
申请人
BOART INTERNATIONAL LIMITED
发明人
RONALD BAWDEN;DAVID STANLEY WILLIAMS
分类号
E21B
主分类号
E21B
代理机构
代理人
主权项
地址
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