پایگاه جامع علوم اطلاعات شناسه : BS EN 10217-7:2014 عنوان : Welded steel tubes for pressure purposes. Technical delivery conditions. Stainless steel tubes (بیشتر…)
پایگاه جامع علوم اطلاعات شناسه : BS EN 15269-5:2014 عنوان : Extended application of test results for fire resistance and/or smoke control for door, shutter and openable window assemblies, including their elements of building hardware. Fire…