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This standard deals with all significant hazards caused by mechanical processing machines when they are used under the conditions foreseen by the manufacturer. Mechanical processing machines are used in fields of application such as: Cement, lime and gypsum, Quarrying, Sand and Gravel, Industrial minerals, Metaligerous mining (ore preparation), Coal preparation, Building demolition waste, Waste treatment and recycling, slag handling, Brick manufacture, Chemical industry - raw materials handling, Ceramics industry, Lightweight aggregates. All the machines listed in clause 3 are classified as stationary units as they cannot be moved whilst in operation. However, they may be transported from one site to another but at these times they cannot be operated and under this instance conditions are not covered by the Safety Standard. The only exception is machines which operate whilst the carrying chassis is in motion; these machines are covered by the present standard in conjunction with the hazards identified by CEN/TC 151/WG5 for moving working machines.