UL 60730-2-14-2018
UL 安全自动电气控制标准 第 2-14 部分:电动执行器的特殊要求(第三版;2017年6月6日(含)的修订重印)
UL Standard for Safety Automatic Electrical Controls – Part 2-14: Particular Requirements for Electric Actuators (Third Edition; Reprint with revisions through and including June 6 2017)