Machines for underground mines - Safety requirements for hydraulic powered roof supports - Part 3: Hydraulic and electro hydraulic control systems; German version EN 1804-3:2020— 48 стр.
Machines for underground mines - Safety requirements for hydraulic powered roof supports - Part 3: Hydraulic control systems; German version EN 1804-3:2006+A1:2010— 36 стр.
Machines for underground mines - Safety requirements for hydraulic powered roof supports - Part 3: Hydraulic and electro hydraulic control systems; German and English version prEN 1804-3:2019
Machines for underground mines - Safety requirements for hydraulic powered roof supports - Part 3: Hydraulic control systems; German version EN 1804-3:2006+A1:2010— 36 стр.