close-loop test 闭环试验
On the test bed studying the close loop control, applying performance test of some cycle , explain the actual control flow chart at the same time.
并在该构建的平台上进行了闭环自动控制，来进行某一循环工况的性能试验，同时给出其实际的控制流程。
It describes the measure principle of the clamp grounded resister tester, that is, a effective close loop for current flow is necessary when doing the test.
介绍了钳形接地电阻测试仪的测试原理，即在测量时必须要有一个供电流流过的有效的闭合回路。
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