ball coal mill的用法和樣例：
例句
- The coal level in the BBD mill has very important influence on the working performance.
雙進雙出鋼球磨煤機的煤位對磨機的工作性能有非常重要的影響。 - With the field application made, it has been proved that the system can effectively solve the problem of long delay and strong coupling in the ball mill coal pulverizing system.
現場應用表明此系統可有效解決磨煤機制粉系統的大遲延，強耦合控制問題。
