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发明名称
Improvements in screw propelled pedal driven pleasure boats
摘要
申请公布号
GB389600(A)
申请公布日期
1933.03.23
申请号
GB19320000480
申请日期
1932.01.07
申请人
FRANK BEECHING
发明人
分类号
B63H16/20
主分类号
B63H16/20
代理机构
代理人
主权项
地址
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