ISO 7751:1991

Заменен

Rubber and plastics hoses and hose assemblies; ratios of proof and burst pressure to design working pressure — 3 стр.

ISO 7751:1991/Amd.1:2011

Заменен

Rubber and plastics hoses and hose assemblies -- Ratios of proof and burst pressure to maximum working pressure -- Amendment 1: Replacement of "design working pressure" by "maximum working pressure" throughout text — 6 стр.