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Time relays are divided into two types: on-time delay type and off-time delay type, and their symbols are shown in the following figure. For the power-on delay type time relay, when the coil is powered on, the power-on delay type contact acts after the delay time (the normally closed contact is opened and the normally open contact is closed), and the contact immediately returns to normal after the coil is powered off; For the power-off delay type time relay, when the coil is powered on, the power-off delay type contact acts immediately (the normally closed contact is opened and the normally open contact is closed). After the coil is powered off, the contact will not return to normal until the delay time is passed.《逆光青春》描述六个背景不同,个性迥异的年轻人,在追寻梦想的旅途中相遇相知发生的故事。看角色在逆光中朝梦想前进的执著与彷徨,与他们一同在现实社会中感受温情,体验百态,经历欢喜,也可能遇到悲伤与挫折的其中滋味,继而让人沉淀,萌生希望,涌起再次出发的动力。面对毕业与离别前夕的淡淡哀愁,五人大声宣告自己的梦想,并相约在预言家预测世界末日来临的那一天见面。这地方是撑不住人的，必须用木梯。If the festival coincides with Saturday or Sunday, and the unit arranges employees to work overtime, it shall pay overtime wages for rest days according to law.说完一溜烟跑回房梳头换衣裳。再查档案，这才发现小太监入宫前名为赵四，真名已无可考证。