A data storage, storing input MPEG data for a period corresponding to three clocks, is formed of the data storage 1, the data storage 2 and the data storage 3. It relates more particularly to yarns, fibres or filaments exhibiting good fire resistance properties and to processes for the manufacture of these articles. A fuel distribution manifold is disposed at the downstream end of the main body. The new crawling output code is determined based on the previous crawling output code, the direction and the decimal difference. Methods of attaching the mousepad to a desk, table or other support structure are also provided. The chain drive train may include a first stage chain drive adapted to receive mechanical energy from a main shaft of a wind turbine and a second stage chain drive adapted to receive rotational energy from the first stage chain drive and transmitting the rotational energy to one or more generators of the wind turbine.