Equation Icon  k F i |i = − ε4V- [(2m M il+ m M il)Δlk + 2 (m M lk + m M lk)Δli] 1SO dA=0 r312 1 2 2 1 1 2 2 1 4m1 [ i ] = ε r3- 6(⃗s2 × ⃗n12) ⋅ ⃗Vn 12 + 4⃗s2 × ⃗V − 6⃗s2 × ⃗n12 (⃗n12 ⋅ ⃗V ) 12 [ ] +ε4m2- 6(⃗s1 × ⃗n12) ⋅ ⃗V ni12 + 3⃗s1 × ⃗V − 3⃗s1 × ⃗n12(⃗n12 ⋅ ⃗V ) , (221 ) r312