2020EN 1804-2:2020 Machines for underground mines - Safety requirements for hydraulic powered roof supports - Part 2: Power set legs and rams
2010EN 1804-2:2001+A1:2010 Machines for underground mines - Safety requirements for hydraulic powered roof supports - Part 2: Power set legs and rams
2001EN 1804-2:2001 Machines for underground mines - Safety requirements for hydraulic powered roof supports - Part 2: Power set legs and rams (Incorporates Amendment A1: 2010)