Switching phenomena with an associated negative resistance region have been observed in the current-voltage characteristics of lead oxide film sandwiches.
在氧化铅薄膜三层结构的电流——电压特性中发现了具有负电阻区的开关现象。
The design and type of switching CARDS used in an IR test system depend on several factors, including the test voltage, magnitude of resistance, accuracy, com mon connection, etc.
IR测试系统中采用的开关卡的设计和类型取决于多个因素，包括测试电压、电阻数量级、准确度、共用连接，等等。
The reliability index and mechanical environment resistance index of switching electrical apparatus used in aerospace system are gradually upgraded.
执行航空、航天任务的开关电器的可靠性指标与耐力学环境指标正逐步提高。
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