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发明名称
Verfahren zur Herstellung eines Propellerblattes aus einem nahtlosen oder ungeschweissten Metallrohr
摘要
申请公布号
DE640423(C)
申请公布日期
1937.01.04
申请号
DE1931S098264D
申请日期
1931.04.25
申请人
JOHN SQUIRES
发明人
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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