A method for copying data in disk recording media, and disk recording apparatus. A TOF mass spectrometer of the present invention comprises one or more ion focusing electric sectors. The machining system includes a bearing structure translationally mobile along three axes equipped with a main spindle for rotating the grinding tool, and a rotating device bound to the bearing structure and provided with a secondary spindle integral with the knurl moving around the axis of rotation of the grinding pool. The biasing magnetic field is substantially perpendicular to the initial magnetic field and the recording magnetic field is substantially opposite in polarity to the initial magnetic field. The apparatus combines a Pitot tube, sensing apparatus, control apparatus, a display, control switches and a handle into a unitary structure that is holdable with a single hand while performing obtaining measurement data.