A switch panel also is provided to enable control by manual operation.
同时提供了一个开关面板进行手动操作控制。
Various kinds of switch volume can be adjusted according the standard of the panel manual operation combination and normal status and single trouble status testing.
各种开关量的组合，按标准由面板手动操作组合及正常状态和单一故障状态的测试。
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