UL 62841-2-9-2017
UL 标准电动手持式工具安全 可移动工具和草坪和园艺机械 安全 第2-9部分:手持式攻丝机和螺纹机的特殊要求
UL Standard for Safety Electric Motor-Operated Hand-Held Tools Transportable Tools And Lawn And Garden Machinery – Safety – Part 2-9: Particular Requirements For Hand-Held Tappers And Threaders