mechanization of telegraph relay

例句：

1. 1.The factory has been mechanized to improve efficiency.
   该工厂已实现机械化以提高效率。
2. 2.The robotic arms are a marvel of mechanization.
   这些机器人手臂是机械化的奇迹。
3. 3. Mechanization is essential for modern industry.
   机械化对于现代工业至关重要。