Is it possible install octoprint with sindoh 3dwox DP200 and Cubepro Trio?
I was a bit irritated about the term closed system. Afaik, that is a system that does not allow a connection from outside this system.
The printers you mentioned are enclosed printers.
As long they use RapRap firmware (Marlin, Repetier etc), they maybe run with OctoPrint.
You may get that information from the manufacturerr.