equation icon  V~ --------------------------- D (l,Q) = ef(r(l,Q))R(r ) cosQ R (r(l,Q))2 - R(r2 ) sin2 Q + integral O O ...r(Q,l) S(r) R(r)dr × V~ -------------------2--3, (91) rO... R(r)2 - R(rO)2 sin Q f(r(l,Q)) sin f(l,Q) D- (l,Q) = e R (r(l,Q)) ----------. (92) sinQ