placed material的用法和樣例：
例句
- The coil material can be stacked, reducing feeding time and saving coil changing time.
卷料積材可重疊放置，減少填料次數，節省換料時間。 - The result showed that the backfilling material made with phosphogypsum and fly ash can completely meet the technical demand of industrial fifing.
其試驗結果顯示，用磷石膏和粉煤灰製作膠結充填料是完全滿足現場工藝的要求。
