Considering that the surface of the magnetic pole is an ideal magneticwall, by means of mirror method, the effect of outer magnetic pole on resonator impedance is analyzed quantitatively. The...
视磁极面为理想磁壁，应用镜象法，定量分析了外磁铁极头对谐振子阻抗的影响。
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A magnetic holder screwed to the wall is a practical way of keeping knives always within reach and isolated from other objects that could dull and dent the blades by knocking against them.