In order to make a comparison of test results, equal distance between capacitancedetector and open side of test bag must be assured in each test.
为了保证所测试的结果具有可比性，必须保持电容探头离试样袋口相等的距离。
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So, it's very important to research capacitance proximity fuze. This paper researched the main systems of capacitance proximity fuze including detector, signal processor and simulation-testing system.