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发明名称
Variable-pitch propeller
摘要
申请公布号
US1788263(A)
申请公布日期
1931.01.06
申请号
US19290354597
申请日期
1929.04.12
申请人
WILLIAMS WILLIAM S
发明人
WILLIAMS WILLIAM S.
分类号
B64C11/34
主分类号
B64C11/34
代理机构
代理人
主权项
地址
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