Dragflow North America 69 Deep Dene road , West Vancouver , V7S 1A1 Canada About Solutions products services training Publications videos articles Downloads Companies Dragflow North America Articles Case study - sand and gravel extraction Case study - sand and gravel extraction 0 Share Jan. 22, 2013 Courtesy of Dragflow North America Location: AzerbaijanYear: 2008Dragflow Pump HY300 for sand and gravel application. Customer comments No comments were found for Case study - sand and gravel extraction. Be the first to comment! Add your comment Publish your comment Great! comment successfully added!