If user combines the two in actual operating process, frequency of mechanical rapping can be reduced and the impact on heating surface welded junction of mechanical rapping position can be relieved.
如用户在实际运行过程中两者结合使用，可减少机械振打的频率，减轻对机械振打部位的受热面焊口的冲击。
Realistic device characteristics can be analyzed under actual operating conditions by varying the test frequency, test signal level, and dc bias.
切合实际器件特性可以分析根据实际营运情况，由不同检测频率，测试信号水平和直流偏置。
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