combination topping and cracking plant

例句：

1. 1.The combination topping and cracking plant isused to process the raw materials into finishedproducts.
   组合顶料和开裂装置用于将原材料加工成成品。
2. 2. The combinationtopping and cracking planthas been upgraded to improveefficiency.
   组合顶料和开裂装置已升级以提高效率。
3. 3. The combination topping and cracking plant is a crucial part of theproduction process.
   组合顶料和开裂装置是生产过程中至关重要的一部分。