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1. OST 1 41426-73
Installation of piping systems. Ensuring interchangeability of elements. General technical requirements for the means of
manufacturing of system elements.
ОСТ 1 41426-73
Монтаж трубопроводных систем. Обеспечение взаимозаменяемости элементов. Общие технические требования к
средствам изготовления элементов систем.