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发明名称
Casing centralizer
摘要
申请公布号
USD665824(S1)
申请公布日期
2012.08.21
申请号
US201129405117F
申请日期
2011.10.28
申请人
ANDRIGO GREGORY;SANCHEZ ALFREDO;TOP-CO CEMENTING PRODUCTS INC.
发明人
ANDRIGO GREGORY;SANCHEZ ALFREDO
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