4
8944-75*
1998
Ductile iron and steel fittings with parallel thread for pipelines. Technical requirements
8944-59, 8945-59
14.11.75 2901
01.01.77
, ( 2-93)
* 1, 1977 . ( 2-77).
1.1. . 1 . 1, - . 2 . 1.
1
02.07.2015
