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发明名称
Protective rings for pipe coatings
摘要
申请公布号
US3352574(A)
申请公布日期
1967.11.14
申请号
US19650432225
申请日期
1965.02.12
申请人
BRIAN ARTHUR L
发明人
BRIAN ARTHUR L.
分类号
B65D59/02;E21B17/10;F16L15/00;F16L15/04
主分类号
B65D59/02
代理机构
代理人
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地址
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