A tank of a ship is provided with an inflow port and an outflow port opening through a bottom of the ship. The invented apparatus, or assembly, enables the rapid automated test transition from testing a plurality of devices of a first body shape to a plurality of devices having a second body shape, where both types of devices have electrical contacts arranged within a device contact plane and according to a common grid pattern. The optimized nonlinear behavioral model can then be applied to evaluate figures of merit for multiple devices under test in a manufacturing line. The rear surface of the bottom plate and the rear faces of the joint portions of the terminals are positioned on the same plane or approximately the same plane to thereby render the sound-vibration generating device mountable on the surface of the board. Therefore, this invention can provide a method, other then heat, for activating the P-type semiconductor layer of a semiconductor device. The interference reduction unit comprises a decision feedback equalizer that has a feedforward filter for reducing precursor interference and a feedback filter for reducing postcursor interference in the received signal.