In a rotary joint for a rotary shaft device, ring-shaped inner seals and outer seals are projectingly arranged, and concentric with faces of a front joint disk and a rear joint disk opposing with each other respectively. The method includes detaching a layer from a base structure to provide a carrier substrate having a detached surface, and then forming a microstructure on the detached surface of the carrier substrate by depositing an epitaxial layer on the detached surface of a carrier substrate. An unambiguous numerical representation of the circuit can be generated and used to categorically determine if two circuits are indeed alike, or whether the structural and termination characteristics of a particular circuit has remained the same or changed over time. Drawing information including drawing commands is sent to the remote computer. The periodic poling structure further comprises a plurality of conductive blocks covering the entire base surfaces of the tunnels, or separated from the sidewalls of the tunnels by insulation gaps such that the conductive blocks cover only a portion of the base surfaces of the tunnels. The apparatus also includes a plurality of mixers, each mixer configured to mix an associated split signal and an associated signal combination into an associated mixed signal, a first digitizer configured to digitize an associated split signal, and a plurality of second digitizers, each second digitizer configured to digitize an associated mixed signal.