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25赫兹相敏轨道电路
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25赫兹相敏轨道电路
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工学
轨道电路
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25Hz phase detecting track circuit
25赫兹相敏轨道电路
具有两个供电单元传送25赫兹交流信号,除从钢轨取得电源外,还需另外供给局部电源,采用调相方式的轨道电路制式。当两个单元同时得到规定相位差的25赫兹交流电源时,轨道继电器吸起,否则落下,用于反映本区段有、无列车两种状态的25赫兹交流信号的轨道电路。
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water pollution control planning
water pollution control system
water pollution emergency management
water pollution in China
water pollution prevention and control
water pollution prevention and control law
Water Pollution Prevention and Control Law of the People's Republic of China
water pollution prevention and control plan at the watershed scale
water pollution prone pesticide
water pollution-prone pesticide
water pollution source
water pollution source management
water polo
water pore
water potential
water potential in soil
water-powered roller
water power plant control system
water pressure
water pressure blasting
water pressure test
water pressure testing
water price
water price classification
water price components
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