An ion sening circuit comprises a bridge sensing circuit and a differential amplifying circuit. Because the target engine speed is corrected according to the crank angle, the engine can be stopped at the target stop position even if the friction in the engine, the electric motor, etc. Each local cross current feedback controller is configured for receiving common mode cross currents from a respective local cross current detector, calculating a resultant cross current, and generating a local feedback control signal. Because the partition table is in the TRM 1, only a CPU 7 in the TRM 1 is able to access the generated partition table. The system may include one or more user computers operated by the one or more users and one or more network servers, the network servers in communication with the one or more user computers, the network server being configured to relay video transmissions of the service event from the one or more video transmission devices to the one or more user computers via a communications network. while removing steam and if appropriate diamines through venting orifices.