1. GOST 12.4.244-2013
Occupational safety standards system. Respiratory protective devices. Half masks and quarter masks from isolating. General
specifications
ГОСТ 12.4.244-2013
Система стандартов безопасности труда. Средства индивидуальной защиты органов дыхания. Полумаски и четверть маски
из изолирующих материалов. Общие технические условия
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