An action plan shows the country aims to double its manufacturing robot density by 2025 compared with that of 2020.
一项行动计划显示，我国目标是到 2025 年，制造业机器人密度较 2020 年实现翻番。
英语百科
Double density
Double density, often shortened DD, is a capacity designation on magnetic storage, usually floppy disks. It describes the use of an encoding (or modulation) of information, which can encode on average twice as many bits per time unit compared to single density. This is achieved by using MFM instead of FM.