When the magnetic field deviates from potential or force-free field, the field-aligned current can be produced, and it relates closely with the intensity and lifetime of ducts.
当磁场偏离势场或无力场时，将会产生场向电流，该电流与导管的强度和稳定维持密切相关。
The aligned nanotube thin films are substantially strong, and chemically inertial with their onset field low and the emission current strong.
碳纳米管薄膜机械强度高，化学稳定性好，并且有很低的发射场强阀值，较高的发射电流密度。
Based on Ampere" Molecular Current Hypothesis, Dipole theory and Ampere Law, the interaction force formulation of two spherical particles which aligned with the external field is firstly deduced."
然后根据安培分子电流假说、偶极子理论和安培定理，计算了沿磁场方向两个球形粒子的作用力表达式。
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