working portion

• 工作部分

working portion的用法和样例：

例句

1. Additionally, the shell is fixed on its pedestal with bolts, when the machine is running, the working part is covered with a mantle.
   另外，把外壳用螺钉固定在底座上，在机器工作的时候，再用一个罩子把机器的工作部分罩起来。