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发明名称
DEVICE FOR MANIPULATING A PIG, OR SCRAPER, MOVED THROUGH A PIPELINE BY A PROPELLING FLUID UNDER PRESSURE
摘要
申请公布号
CA910158(A)
申请公布日期
1972.09.19
申请号
CAD910158
申请日期
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ, N.V.
发明人
HANS HINZ
分类号
主分类号
代理机构
代理人
主权项
地址
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