可是，月球磁芯有点小，并且用这个理论看，月球表面磁场力还存在一些疑问。
However the small size of the Moon's core and the required surface magnetic field strengths were problematic for this theory.
该探头能够通过设计的检测线圈来提取铝板表面磁场扰动的微弱变化。
A pick-up coil of the sensor designed can acquire the faint signal of the magnetic perturbation on surface of aluminum plane.
这样不但对磁系表面磁场影响小，而且对磁系有足够强的包裹涨紧力，效果显著。
Such not only of magnetic field is the surface of magnetic effect is small, and are strong enough package when tight force, the effect is remarkable.
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