A semiconductor device is a hetero-junction bipolar transistor structured by having a gallium arsenide film among laminated films, which has an indium gallium phosphide film which is connected to the gallium arsenide film and functions as an emitter, wherein the indium gallium phosphide film includes antimony. Further included is a depressible resilient means disposed between the pair of elongate plunger members and the central guide member, operative to permit mutual contraction of the plunger members in response to opposing axial forces applied thereto. The demands of various multimedia communication services such as the PoC service can be satisfied well. Another aspect of the invention is a process for making the polyol. The clamping device comprises a lockable slide for adjusting the position of the clamping element. The NHE-1 inhibitors are useful for the reduction of tissue damage resulting from tissue ischemia.