A surface compensating shaving apparatus has been provided for removing a plurality of pins from a surface of a pinmat. A compound represented by the general formula :, a salt thereof, an N-oxide thereof, a solvate thereof or a prodrug thereof is useful as a drug component having Trk-inhibiting activity in prophylaxis andor therapy of diseases such as pain, pruritus, lower urinary tract dysfunction, asthma, allergic rhinitis, inflammatory bowel disease or Chagas disease. The system forms a sacrificial layer composed of a third material on the buffer layer. Spoken messages from a vehicle occupant are recorded via an acoustic input unit, processed and transmitted to the central computer by reversal of the same process.