automatic block的用法和樣例：
例句
- Automatic Block and Footing keys for material estimates.
自動閉塞和落腳點鑰匙材料估計。 - By comparing the two formulas, the paper concludes that moving automatic block can reduce the train headway and improve the transportation capacity.
通過對兩公式的比對，得出了移動自動閉塞系統能夠縮短列車的運行間隔，提高線路的通行能力。
