With its rugged limestone hills and upland farmland, divided by ancient stone walls, the Parque Natural das Serras de Aire e Candeeiros national park in Portugal is a major tourist attraction. It is also the center of operations for a number of large limestone quarries. Previously, many were using Atlas Copco BBD 94 DSI pneumatic rock drills. Now, to satisfy local concerns about noise levels, Atlas Copco is supplying the quarries with BBC 34 DSI models. These offer the same high performance but with a 5 dB(A) lower noise level.
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