double precision ssA,ssB,ssC,ssXs
double precision ssxm,ljxm,ssm,ljm
double precision d_ssxm(1:3),d_ljxm(1:3),d_ssm(1:3),d_ljm(1:3)
double precision ssA,ssB,ssC,ssXs
double precision ssxm,ljxm,ssm,ljm
double precision d_ssxm(1:3),d_ljxm(1:3),d_ssm(1:3),d_ljm(1:3)