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发明名称
APPARATUS FOR PROTECTING VERTICAL PIPELINES
摘要
申请公布号
PL112686(B2)
申请公布日期
1980.10.31
申请号
PL19780204235
申请日期
1978.01.24
申请人
发明人
分类号
E03B3/11;F16L;F16L3/14;(IPC1-7):F16L3/14
主分类号
E03B3/11
代理机构
代理人
主权项
地址
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