استاندارد بین المللی BS EN 14758-1

Plastics piping systems for non-pressure underground drainage and sewerage. Polypropylene with mineral modifiers (PP-MD). Specifications for pipes, fittings and the system ...

استاندارد بین المللی BS EN 713

Plastics piping systems. Mechanical joints between fittings and polyolefin pressure pipes. Test method for leaktightness under internal pressure of assemblies subjected to bending ...

BS ISO 683-5: 2017

38 صفحه pdf BS ISO 683 Heat treatable steels, alloy steels and free-cutting steels Part 5: Nitriding steels 2017 ...