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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.如果有一天，那些你曾哀悼过并亲手埋葬过的亡者突然出现在你的门前，你会作何反应？如果他们声音相貌仍然和 去世前一模一样，仿佛年龄从来没有变老，你又会作何反应？这是奇迹还是疯狂？亦或……那根本就不是现实？居住在阿卡迪亚市（Arcadia）的人们就遇到了这种「亡者归来」的怪事，他们的生活从此被彻底改变。尹旭笑道：前几天带兵攻打胡陵去了，按理说他今天会来的，唉。故事以三个陌生女人在情感互助小组的相遇展开,讲述每个人都有自己急于倾诉却又不得不隐瞒的种种苦衷。Name: Lin LiLet's take a look at these four chu animalsOur sojourn near over and the balcony covered with our labor, we all felt proud and content. Ms. Ping's brother hinted that we could have a drink during dinner, and deliverably dropped a few kilometers out and back to retrieve two cans of rice wine from the cooking, we each made a separate dish according to our specialty. Later, the table set and a few glasses already