A laminated inductor includes a plurality of magnetic plates, each having a surface to which a high-permeability magnetic body is attached, and at least one spacer assembly interposed between the magnetic plates. According to the present invention, a nondestructive laser lift-off with a small laser-spot is achieved, and a scanning mode of the laser lift-off is improved, thereby a lift-off method without the need of aiming is achieved. Further, the adapting unit 12 updates the transformation function to which the new input speech is allocated by all the input speeches allocated to the transformation function. In particular, the piston comprises a plurality of permanent holes suitable for permanently connecting the first chamber and second chamber and a plurality of apertures associated each to a plurality of plug elements pivotally connected by connection means, on a face of the piston at the apertures.