Test item 测试名称： Building Hardware --- Controlled door closing devices --- Requirements and test method 建筑构件 控制门关闭装置 要求和试验方法Test info 测试内容： Testing Items MarkingRequirements concerning product informationWorkmanship DurabilityClosing momentOpening momentEfficiencyClosing timeAngles of operationOverload performanceTemperature dependenceFluid leakageLatch control (optional)Backcheck (optional)Delayed closing (optional)Adjustable closing force (optional)Zero position performance (for double action door closers only)Corrosion resistanceAdditional requirements for a door closer intended for use on fire/smoke door assembliesSample Reqiurement: 7 pieces of samples样品要求： 7件样品Turnaround time: normal (37 working days)所需时间: 标准(37 个工作天) Sample for reference 参考图片: Sample Report 报告样本：