美利体育登录入口官网:LST EN 17020-4-2021
门组和开窗自闭耐久性试验结果的扩展应用 第4部分:铰链和/或旋转金属框玻璃门组和开窗的耐火和/或防烟自闭耐久性
Extended application of test results on durability of self-closing for doorsets and openable windows - Part 4: Durability of self-closing of fire resistance and/or smoke control hinged and pivoted metal framed glazed doorsets and openable windows