tabsurf & revsurf shape

Helo there

I have a question about tabsurf and revsurf commands. If I use them for polylines, Brics cad makes me poly mash, but dosn`t hold corners. It looks like it extrude all polyline like one object. Is there way to use this commands for polyline, but to use it for each part of polyline separatly. Like for extrude 3d entities.

Of course i can explode the polyline, but I`d like to don`t do that.

Thanks for an answare