When the magnetic field deviates from potential or force-free field, the field-alignedcurrent 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。
2
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。
3
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."