It is the only way to solve above problems that the earth leakage circuit breaker of time lag action and the distribution protection are adopted in low voltage supply system.
在低压供电系统内采用延时动作的漏电保护开关和分级保护技术，是解决上述问题的唯一途径。
Thus, low voltage protection devices, served as lock-out protection reserve will also have characters uf inverse time-lag.
因此，作为失步保护后备的低电压保护也应具有反时限特性。
For a long time, environment protection focuses on industrial pollution control and comprehensive improvement of urban environment, which makes the protection of agriculture environment lag behind.
长期以来，环境保护工作重点放在工业污染防治和城市环境综合整治方面，农业环境保护相对滞后。
For a long time, environment protection focuses on industrial pollution control and comprehensive improvement of urban environment, which makes the protection of agriculture environment lag behind.
长期以来，环境保护工作重点放在工业污染防治和城市环境综合整治方面，农业环境保护相对滞后。
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