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 - Part 20: Smoke control for hinged and pivoted steel, timber and metal framed glazed doorsets
门、百叶窗和可开启窗户组件 包括其建筑五金元件的防火和/或防烟试验结果的扩展应用第20部分:铰链和枢轴钢、木材和金属框架玻璃门组的防烟