DIN 7079-1 - DRAFT
DIN 7079-1 - DRAFT Draft Document - Pressure resistant circular glass-to-metal fused sight glasses - Part 1: For holders with recess
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2014
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2014