[求助] Maple 怎么自动读取图上的坐标？

with(plots); implicitplot(-28900-(384000/289)*Pi^2*r0^3*((1/835210000)*Pi^2*r0^6*ln(Pi*r^2*r0^3-48000*Pi*r0^3)-(48/417605)*Pi^2*r0^6*ln(Pi*r^2*r0^3-48000*Pi*r0^3)/r^2+(230400/83521)*Pi^2*r0^6*ln(Pi*r^2*r0^3-48000*Pi*r0^3)/r^4)/r^4+(384000/289)*Pi^2*r0^3*((1/2)*r0^2+(1/28900)*Pi*r0^4-(480/289)*Pi*r0^4/r^2+(1/835210000)*Pi^2*r0^6*ln(Pi*r^2*r0^3-48000*Pi*r0^3-28900*r^2*r0)-(48/417605)*Pi^2*r0^6*ln(Pi*r^2*r0^3-48000*Pi*r0^3-28900*r^2*r0)/r^2+(230400/83521)*Pi^2*r0^6*ln(Pi*r^2*r0^3-48000*Pi*r0^3-28900*r^2*r0)/r^4)/r^4+480000*Pi*r0^2*(-Pi*r0^2+28900)*(-r^2+2*sqrt(r^2+400*r0^2))/((5*(-Pi*r0^2+28900))*(r^2+400*r0^2)+240000*Pi*r0^2*sqrt(r^2+400*r0^2)) = 0, r = .1 .. 9, r0 = .1 .. 3);