You can link two or more rooms together with an Quantum Entangler. This allows you to access the same room from different Compact Machine blocks.
[crafting{200,55,key=item/compactmachines:quantumentangler}]












This only works on Upgraded Compact Machines! First right click the "source" machine, then right click an unused, but upgraded Compact Machine block. Unused means that no one ever entered it before.