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经营范围
发明名称
Improvements in or relating to pistons
摘要
申请公布号
GB345723(A)
申请公布日期
1931.04.02
申请号
GB19300001754
申请日期
1930.01.17
申请人
HERMAN DOCK
发明人
分类号
F16J1/22
主分类号
F16J1/22
代理机构
代理人
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