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经营范围
发明名称
Hollow propeller blade
摘要
申请公布号
US2450455(A)
申请公布日期
1948.10.05
申请号
US19440553876
申请日期
1944.09.13
申请人
SNYDER CARL J
发明人
SNYDER CARL J.
分类号
B21D53/78
主分类号
B21D53/78
代理机构
代理人
主权项
地址
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