line lock of force力线
shocking line moment of force节线冲击力矩
magnet line of force磁力线
line of electric force电力线
Line of magmetic force磁力线
line of magnetic force磁力线
field line of force场力线
westbank line of force力线
magnetic line of force[电磁] 磁力线;翻译;磁通量
N（名词） an imaginary line representing a field of force, such as an electric or magnetic field, such that the tangent at any point is the direction of the field vector at that point 力场的(虚构)线