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This unique dust free blast machine is special for steel construction, shipbuilding, marine, bridges, petrochemical, oil tank, pipes and other industries, applying for weld treatment, deburring, fly edge, and oxide, also can be used on concrete, stone surface and others surface treatment. Compact and solid and multi-function equipment provides efficient , safety and stable recovery ability, and automatically recycle abrasive after separating from dust. It keeps a friend working environment.