There are many such machines known...; they are given by such widely disparate topological constructions that it is far from obvious that they turn out equivalent spectra when fed the same data.
Maraming mga ganoong machine na kilala...; ito ay ibinigay sa pamamagitan ng tulad ng nakararaming disparate topological constructions na ito ay malayo sa halata na sila palayasin katumbas spectra kapag mamadol ang parehong data.