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便用了不止一晚，反复解说。When the coil is energized, the iron core attracts the armature and the support plate to move down, and the contact points are turned on or off instantly. The piston rod and the lever slowly decrease due to the influence of the blocking nylon. After a certain period of time, the piston rod decreases to a certain position, and the delayed action contact is pushed by the lever to act, which is in an open state, while the moving contact is closed. The delay time of the relay is the time when the coil is energized until the delay contact completes its action. When the coil is powered off, the relay is restored by the recovery action of the spring.Industrial Revolution 4.0-Intelligent Era: In the next 10 years, it will enter the Industrial 4.0 Era and realize the transformation from "automation" to "intelligence". Through CPS (Cyber-Physical System) network, real-time connection, mutual identification and effective communication among people, equipment and products are realized, and "personalized" customized commodities are tailored for consumers.评价一部小说，只要问四个字就行了：好不好看。2. There will only be one instance per startup in the application. Such as account system and database system.勉强挨到晌午，那肚子越发空的慌，头也晕沉沉的，满脑子想的都是家里各样吃食。故事描述人们一生只有一次机会获得更好的生活和地位，但每个人都必须经历残酷（而且并不公平）的选拔过程——只有百分之三的候选人最终能获得成功。这些幸运儿在社会阶层中高人一等，而其他人将面对缺电、缺水、缺食物的可怕生活。制片人表示，人生活在社会中总是要经历各种各样的「选择」（选拔）过程——无论你是否乐意——该剧就是要解读「选择」（选拔）背后的动态关系。