A radio frequency signal RF is input to a base of each of transistors TR1 through TRn via a corresponding capacitor among capacitors C1 through Cn, is amplified, and is output from a collector of each of the transistors TR1 through TRn. The base plate and the shoulder are formed from a single ferromagnetic monolithic block, and in that from the ferromagnetic monolithic block, at the first lateral face of the shoulder, a first recess is formed for housing the first plurality of magnetic conductors. The monomer is useful as a raw material for photoresist polymeric compounds. The seal driving tool affords extended socket life and flexibility of use situations to the user. Instructions for disposition of funds may be received through a web site, through e-mail, on paper, etc. In the magnetic storage device, a yoke is arranged so as to circumferentially surround part of a line extending in an arbitrary direction, and a magneto-resistive element to which information can be written by utilizing a magnetic field generated by the line is arranged in the vicinity of the line.