2013. Development of the 14m x 1.75m beam prototype. 2013. Development of the 14m x 1.75m beam prototype. R&D 2013. Development of the 14m x 1.75m beam prototype. andreu2018-12-10T17:18:37+00:00 2013. Development of the 14m x 1.75m beam prototype.andreu2018-12-10T17:18:37+00:00