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发明名称
Reverse and variable pitch propeller
摘要
申请公布号
US2138574(A)
申请公布日期
1938.11.29
申请号
US19360104169
申请日期
1936.10.06
申请人
GALLAGHER JAMES A
发明人
GALLAGHER JAMES A.
分类号
B63H3/04
主分类号
B63H3/04
代理机构
代理人
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地址
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