DIN 87721-2 - DRAFT
DIN 87721-2 - DRAFT
Draft Document - Drain screws - Part 2: Screws, welding platesstandard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2017
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2017