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2. Conveyor technologies for the regulatory environment;Greg,2010
3. Pipe conveyors transport bulk material efficiently over long distances;Frank;World Min. – Surf. Underg.,2011
4. The history of pipe conveyors;Staples;Bulk Solids Hand.,2002
5. Pipe/tube conveyors-a modern method of bulk materials transport;Loeffier;Bulk Solids Hand.,2000