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经营范围
发明名称
Improvements in or relating to piston rings
摘要
申请公布号
GB468534(A)
申请公布日期
1937.07.07
申请号
GB19360011313
申请日期
1936.04.20
申请人
CELESTINO STOFFEL
发明人
分类号
F16J9/14
主分类号
F16J9/14
代理机构
代理人
主权项
地址
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