例句與造句

1. the toothed double-roll coal crushers designde and manufactured by our plant are reasonable in construction excellent in perfor mance and reliable in quality
   我廠設計制造的雙輥齒牙式碎煤機結構合理、性能良好、質量可靠。
2. the toothed double-roll coal crushers designed and manufactured by our plant are reasonable in construction excellent in perfor mance and reliable in quality
   我廠設計制造的雙輥齒牙式碎煤機結構合理、性能良好、質量可靠。
3. It's difficult to find roll coal in a sentence. 用roll coal造句挺難的