还记得卡车上的毂盖吗？

Remember that hub cap from the truck?

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介绍了转毂试验台的结构、原理、工作过程及测试程序。

The structure, the principle, working procedures and the check program are introduced.

youdao

介绍了转毂试验台的结构、原理、工作过程及测试程序。

The structure, the principle, working procedures and the check program are introduced.

youdao