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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.板栗先抬手示意众人不必多礼，然后笑问：各位想问本王什么问题？那书生拱手道：观此剧后，我等皆为王爷和周姑娘之间的奇缘感动。At this moment, I don't know who shouted, 'ah, why did the raft float away?'落魄女画师郑雪景（刘馨棋饰），在京城经营着祖上传下来的屏风店，在她突然身患怪病的同时，男友出轨闺蜜，在两人大婚当晚，伤心欲绝的她醉醺醺的误入一家处在异世界夹缝的酒馆，偶然间得到一只御仙笔，在屏风上解封了三个男狐仙，分别是赤煞大人余琰（罗云熙饰）、沉茗白笙（黄俊捷饰），小黑（王朝阳饰）。阴差阳错之下，郑雪景和他们缔结了主仆契约，一人三狐被命运的红线紧紧捆绑在了一起[1] 。三个狐仙男仆用法力帮郑雪景人生逆袭，获得“第一宫廷女画师”殊荣的同时，她也陷入了由灵犀屏风带来的一连串麻烦，以及与狐仙男仆们的情感纠葛之中。