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发明名称
A.c. frequency changing means
摘要
申请公布号
US3036218(A)
申请公布日期
1962.05.22
申请号
US19570669082
申请日期
1957.07.01
申请人
SIR HOWARD GRUBB PARSONS & COMPANY LIMITED
发明人
HASWELL RONALD
分类号
G01J3/42;H03B19/10
主分类号
G01J3/42
代理机构
代理人
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