DIN 33961-1 - DRAFT
DIN 33961-1 - DRAFT
Draft Document - Fitness club - Requirements for equipment and operation - Part 1: General requirementsstandard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2015
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2015