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发明名称
Verfahren und Vorrichtung zum Feststellen von Fehlstellen in Schweissnaehten von unzugaenglichen Hohlkoerpern, insbesondere von Rohren
摘要
申请公布号
DE707719(C)
申请公布日期
1941.07.01
申请号
DE1939A089782D
申请日期
1939.06.30
申请人
ALLGEMEINE ROHRLEITUNG AKT.-GES.
发明人
FRANK DR. ROBERT
分类号
G02B23/24
主分类号
G02B23/24
代理机构
代理人
主权项
地址
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