HGo=K NIN2N3 (v1+v2+v3)-(61+2+63) M,M2M3 JH(jO=K K O 180(/o) 0 3603 H( j) = K [( ) ( )] 1 2 3 1 2 3 1 2 3 1 2 3 ( )        + + − + + = j e M M M N N N H j K K   0 180 0 −360 ( j)