摄影器材交易市场建设和经营管理规范
Construction and management specification of photographic equipment trading market
2012-08-01
BS PD CEN/TR 81-12-2014
Safety rules for the construction and installation of lifts. Basics and interpretations-Use of EN 81-20 and EN 81-50 in specific markets
电梯施工和安装的安全规则 基础知识和解释 在特定市场中使用EN 81-20和EN 81-50
2014-10-31
GB/T 24789-2022
用水单位水计量器具配备和管理通则
General rules for equipping and managing of the water measuring instrument in water-use organization