mining gravel sand pit excavator digger dredger extraction machine colliery output quarry building gray pile mine |
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| navigate by keyword : ballast building change colliery construction construstion czech degradation devastation digger dredge drought europe european excavator extraction global gravel gray grit highways hole human industry landscape machine machines material mine mining nature open output pea pile pit plants quality quarry quartz roadmetal sand shovel silica site soil stand surface towns yellow |
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| Mining for gravel sand pit excavator or digger machine dredger extraction colliery output of building surface gray pile and mine quarry grit quartz pea ballast road-metal, high quality industry building material, hole devastation of nature and landscape, construstion site, global change, degradation of nature by human activity, construction of highways and towns, Czech Republic, Europe, European Union |
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