Toys with an end mass greater than 0.02 kg (0.04 lb) shall have cord length less than 50 cm (20 in.) measured when rotating at 80 r/min.是什么意思_Toys with an end mass greater than 0.02 kg (0.04 lb) shall have cord length less than 50 cm (20 in.) measured when rotating at 80 r/min.在线翻译_英语_读音_用法_例句