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the parque natural das serras de aire e candeeiros national park in portugal is a major tourist attraction. patrick smith reports with its rugged limestone hills and upland farmland, divided by ancient stone walls, it is also the centre of operations for a number of large limestone quarries.
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drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation.it is practiced most often in mining, quarrying and civil engineering such as dam or road construction.
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