HG/T 20592  法兰 WN 40-63 M S=46rfSCH6 2 RF/55-12400.Б∙╗Б■░я┌п╕п╒Б∙╗п║я┌п╕п╟я┌п╓п░Б∙╗Б√▓я┌п╔п═Б∙╗Б■