Processes for forming a coating on electroconductive flat blanks having two major surfaces and sheared edges are provided. Circuits are provided for an internal memory which stores a plurality of individual codes wherein each code is assigned to a particular person from whom telephone messages are welcome. These may be measurements of a biochemical marker in a maternal sample or measurements of a marker from an ultrasound scan. The composite shell is detachably assembled to the rack. In a method of transmitting, by a transmitter, channel estimation signals for channel estimation at a receiver, the transmission antennas transmit the same channel estimation signals for a first frame transmission duration, and transmit predetermined channel estimation signals corresponding to the number of the transmission antennas for a second frame transmission duration. The shielding member has a length along a predetermined directional axis X set substantially to \xbc\u03bb or more, the wavelength of an electromagnetic wave used for communication being \u03bb.