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发明名称
A SPACER BLOCK FOR MAT PACKS
摘要
申请公布号
ZA8002330(B)
申请公布日期
1981.04.29
申请号
ZA19800002330
申请日期
1980.04.18
申请人
VERMICULITE ENTERPRISES & MINING MATERIALS PTY LTD
发明人
BERGH J
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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