.
28759.4-90
Still butt welded flanges of vessels and apparatus for gaskets of octangular sections. Design and dimensions
01.01.92
400 1600 6,3 16,0 70 540, , , .
28759.1.
. 1.2 D, , D1, D2, D3, D4, D6, D7; . 5 D , .