The testing device of direct current injection is manufactured and tested in space-time and frequency.

设计制作了直接电流注入异型测试装置，并对装置的时域、频域特性进行了测定。

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The testing device of direct current injection is manufactured and tested in space-time and frequency.

设计制作了直接电流注入异型测试装置，并对装置的时域、频域特性进行了测定。

youdao