This invention relates to a process for reducing the level of pollutants in the exhaust of a diesel engine, comprising: operating said diesel engine using as the fuel a water-diesel fuel emulsion; and contacting the exhaust gas from said diesel engine with an oxidation catalyst. The cylinder lock comprises a cylinder body, an inner cylinder and a rotating part. The lamp housing comprises an air supply device disposed outside of the test chamber for supplying cooling air, a cooling device located between an inner optical filter and the lower seal portion of the lamp, and an air volume adjustment device. The decoder divides the media signal into blocks of samples and calculates a function of the samples in the blocks, including transformations of samples in the blocks to corresponding block values. The other surface of the diaphragm is fixed to one end of the valve body, and subjected to fluid in a fluid chamber. The supporting backer is formed separately from the transaction product and includes a flap extending into the pocket to at least partially couple the supporting backer to the transaction product.