DIN 22100-3 E:2009 Draft Document - Articles and materials from synthetic for use in underground mines - Part 3: Spiral air ducts - Safety requirements, testing, marking
2010DIN 22100-3:2010-10 Articles and materials from synthetic for use in underground mines - Part 3: Spiral air ducts - Safety requirements, testing, marking
2010DIN 22100-3:2010 Articles and materials from synthetic for use in underground mines - Part 3: Spiral air ducts - Safety requirements, testing, marking
1993DIN 22100-3:1993 Articles and materials from synthetic for use in underground mines; spiral air ducts; safety requirements, testing, marking