Therefore, the magnetomotive force in the air gap is essentially proportional to the primary ampereturns squared . 所以，气隙中的磁动势实际上与初级安匝数的平方成正比。
Base metals and gold are often found in association with magnetic minerals such as magnetite and pyrrhotite . 某些贱金属以及金常常与磁铁矿和磁黄铁矿这类磁性矿物一起被发现。
For low-frequency currents(up to about 15, 000 cycles per second)an iron core, called a magnetic circuit; is placed . 对于低频率电流（约15，000周秒以内），置有一个叫作磁路的铁心。
In other words, each domain is spontaneously magnetized to saturation even in the absence of any external field . 换句话说，即使在没有任何外磁场的情况下，每个磁畴也自发地磁化到饱和。
Because this fact was no recognized, the early magnetic prospecting for iron deposits was spectacularly unsuccessful . 由于不了解这个事实，因此早期为寻找铁矿进行磁法勘深，遭到了惊人的失败。
Its low amplitude makes it less important as a source of disturbance in magnetic prospecting than the solar component . 作为磁法勘探中的干扰源，它的幅度很小，所以远不及太阳日变分量那么重要。
Dye-penetrant and magneticparticle inspection techniques were used on the repaired and other 21 remaining original welds . 在已修补了的和其余21个原来的焊缝上进行了着色渗透和磁粉探伤工艺处理。
The crank reference pulse originates from a variable reluctant pickup which senses a projection on the engine's flywheel . 曲柄参考点脉冲信号由一个变磁阻传感器产生，它从发动机飞轮上的突起感受信号。
