A measuring method combining main magnetic flux and magnetic flux leakage for approaching the residual wall thickness of the oil well tubing in-service was presented.

提出采用主磁通与漏磁通相结合的方法检测在用油管剩余壁厚的方法。

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The main problem to calculate the emf within a rotating coil is to find out the magnetic flux which is changing with time.

计算旋转着的线圈中的电动势的主要问题是求出线圈中随时间而变化的磁通量。

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Around the main circuit, the magnetic flux density was the strongest around high current conductors, then electrode, upright column and cross arm, and the weakest was around crystallizer.

在主回路中，各区域磁感应强度由强到弱的顺序为导线区域、电极区域、立柱和横臂区域、结晶器区域。

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