Magnetic drum Cylinder having a magnetic surface on which to store data.

有磁性表面，可贮存数据的圆筒。

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There are also bad sectors that cannot be recovered because the magnetic surface is scratched.

也有坏扇区，不能收回的，因为磁表面是抓伤。

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The analytic solutions and numerical solutions of the equations of magnetic surface with fixed-boundary conditions are solved for the equilibrium plasma.

本文解出了具有固定边界的平衡等离子体磁面方程的解析解和数值解。

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They'd balance a spoon-shaped piece of magnetic rock on any flat surface, and since it was magnetic, the handle would swivel to align itself with the Earth's magnetic poles.

FORBES: Magazine Article

Magnetic activity on the stellar surface could also be caused by accretion of material onto it.

MSN: Newborn star's 'heartbeat' seen by X-ray telescopes

"We think that magnetic activity on or around the stellar surface creates the super-hot plasma, " Hamaguchi said.

MSN: Newborn star's 'heartbeat' seen by X-ray telescopes