A biocompatible implant comprising a surface layer metallurgically bonded to a substrate and incorporating one or more tissue-growth enhancing materials such as calcium or phosphorus therein. The serial-parallel converter 12 applies a serial-parallel conversion to a predetermined number of complex numbers and the primary modulation signal, and assigns the converted complex numbers and primary modulation signal to subcarriers to generate a subcarrier modulation signal. In case the situation check decides that a delay is present, case entry is suppressed so as to control a case amount and a work amount. The clamping bolt defines a force applying surface located in a first plane whereas the clamping block defines a force receiving surface located in a second plane, the first and second planes located at a diverging angle with respect to each other. The presence of the strontium additive reduces sulfur-containing deposits on the battery anode, thereby providing a battery with relatively high energy density and good partial discharge performance.