以下为句子列表：
英文: Abstract: The general situation and progress of magnetic dipole theoryresearch during recent twenty years in China were introduced briefly including magnetic dipole; linear and strip magnetic dipoles of finite lengths; magnetic force on a magnetic particl
中文: 文摘:简述20年来中国无损检测中磁偶板子理论研究的概况和进展，主要介绍磁偶极子，有限长磁偶极线和极带，磁粉颗粒的受力，磁化场方向对磁粉显现缺陷的影响，棒料、管材和方钢的纵向磁化，工件表面沟槽深度对其引起漏磁场的影响，周向磁化时工件底棱上的杂乱显示成因，圆盘边缘柱面上沟槽内外漏磁场的解析表达式和针状磁介质对两个点磁荷间磁力的影响等。
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英文: Based on an analysis of the formation mechanism of induced current in underground pipelines, the author holds that, where underground media show very poor conductance, underground pipelines are dominated by magnetic dipole lines, and where underground med
中文: 摘要通过对地下管线中的感应电流形成机理分析，本文认为，当地下介质导电性很差时，地下管线以磁偶极线为主；而当地下介质存在一定的导电性时，管线则等效于电流线。
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英文: Finish Electric Dipole Radiation. Qualitative Aspects of Electric Quadrupole and Magnetic Dipole Radiation.
中文: 31结束电偶极辐射之讨论。定性解释电四极特性及磁偶极辐射。
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英文: The general situation and progress of magnetic dipole theoryresearch during recent twenty years in China were introduced briefly including magnetic dipole; linear and strip magnetic dipoles of finite lengths; magnetic force on a magnetic particle; the eff
中文: 简述20年来中国无损检测中磁偶板子理论研究的概况和进展，主要介绍磁偶极子，有限长磁偶极线和极带，磁粉颗粒的受力，磁化场方向对磁粉显现缺陷的影响，棒料、管材和方钢的纵向磁化，工件表面沟槽深度对其引起漏磁场的影响，周向磁化时工件底棱上的杂乱显示成因，圆盘边缘柱面上沟槽内外漏磁场的解析表达式和针状磁介质对两个点磁荷间磁力的影响等。
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英文: The magnetic leakage field distribution above linear defects of a tube sample under the geomagnetic field was modeled according to magnetic dipole theory.
中文: 摘要利用磁偶极子理论，建立稳恒微弱地磁场作用下管类试件线状缺陷段产生的漏磁场模型。
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