NA 119
DIN Standards Committee Water Practice
Standards
[CURRENT]
DIN 19052-3
DIN 19052-3
Microfilm technics, microfilming of engineering drawings; reduction ratios for recording on film 35 mm and reenlargement ratio
Title (German)
Mikrofilmtechnik, Zeichnungsverfilmung; Mikrofilm 35 mm, Verkleinerungs- und Vergrößerungsfaktoren