An apparatus configured to write input data on an optical recording medium using a write pulse waveform, the write pulse waveform including a first pulse, a last pulse and a multi-pulse train, is provided. The polycrystalline diamond is a composite composed of a matrix of coarse diamond interspersed with large agglomerated particles of ultra fine diamond. The information-processing microcomputer 207 has a data transmissionreception prediction section 307 and a communication processing section 305. The first light tube fixing component includes light proof member and a light reflective component. The transmission is positioned intermediate to the prime mover and the cooling system in a manner to optimize the mechanical and functional operation of the work machine.