A plasma processing apparatus, for performing a plasma processing on a substrate to be processed by generating a plasma of the processing gas in an evacuable processing chamber, includes an impedance adjusting mechanism. This new method works for intensity modulated radiation therapy, intensity modulated arc therapy, and hybrid IMRT. The vehicle may include a vehicle device that may be configured to establish connections with other devices using short range and network communications. In one embodiment, the cable connector mounts to the mat connector via threaded fasteners. The sealing lip faces toward the pressure space of the air spring in the assembled condition thereof.