Plotting several spacecurves



Hi.

I am trying to use maxima to work with braids, but i am unable to plot them.

I can plot one thread using parametric 3d plots, but haven't found the way to 
plot several of them simultaneously.

Is it possible to do so? If so, how? If not, would it be possible to implement 
it for future releases?

Thanks in advance.

Miguel Marco.
Departamento de matem?ticas.
Universidad de Zaragoza.