Disclosed is an easily handleable composition for metal surface treatment which enables to achieve foundation surface concealment, coating adhesion and corrosion resistance equal to or higher than those obtained by the conventional metal surface treatment compositions. A first receive antenna and at least one additional receive antenna may receive a plurality of SC communication signals transmitted from at least two transmit antennas. The implantable device is rotated at a relative speed. After implantation of a reservoir of the first embodiment in an organism, cultured cells obtain food and oxygen via diffusion in tissue fluid through the porous walls of the interior chamber, while metabolic products, including drugs, diffuse away from the cell culture in an analogous manner.