This old bed has a copper frame.
这张旧床的床架是铜的。
A new process on EDM is investigated in this experiment, in which a copper frame electrode is used.
实验研究探讨了一种使用线框电极的电火花套料加工的新工艺。
A new process on EDM is investigated in this experiment, in which a copper frame electrode is used.
实验研究探讨了一种使用线框电极的电火花套料加工的新工艺。
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