DIN ISO 4491-4:1990-06

Отменен

Metallic powders; determination of oxygen content by reduction methods; total oxygen by reduction-extraction; identical with ISO 4491-4:1989 — 4 стр.

Заменен на

DIN EN ISO 4491-4:2013-08

ICS

77.160 Powder. Including sintered metal materials and hardmetals / Порошковая металлургия