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发明名称
YIELDING PROP
摘要
申请公布号
ZA8705381(B)
申请公布日期
1988.03.30
申请号
ZA19870005381
申请日期
1987.07.22
申请人
THE STANDARD BRASS, IRON & STEEL FOUNDRIES LIMITED
发明人
JOHN EDWARD LEWTHWAITE
分类号
E21D
主分类号
E21D
代理机构
代理人
主权项
地址
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