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发明名称
Improvements in piston rings
摘要
申请公布号
GB400124(A)
申请公布日期
1933.10.19
申请号
GB19330013429
申请日期
1933.05.09
申请人
JOSEPH BUTTERWORTH
发明人
分类号
F16J9/02
主分类号
F16J9/02
代理机构
代理人
主权项
地址
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