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发明名称
DETECTING VARIATIONS IN AMBIENT MAGNETIC FIELDS
摘要
申请公布号
GB9008631(D0)
申请公布日期
1990.10.10
申请号
GB19900008631
申请日期
1990.04.17
申请人
TRIDENT UNDERWATER ENGINEERING (SYSTEMS) LIMITED
发明人
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主分类号
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