BS 476-24-1987 Fire tests on building materials and structures — Part 24: Method for determination of the fire resistance of ventilation ducts — [ISO title: Fire resistance tests — Ventilation ducts]
建筑材料和建筑构件防火测试 第24部分：通风管道耐火性的测试方法
[attach]72771[/attach] 作者: admin 时间: 2015-5-29 08:19:38