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Single board design phenotype: power supply, metering and logic circuits are concentrated on one board.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.2有本事(feat.TANK) -- 动力火车前世因为帝尊陷害而身死，重生到了高中时代，恰逢灵气复苏，天地巨变。再生少年时，重走修行路，这一世，他当守护自己的朋友、亲人，他当不留遗憾，他当一路横推，他当诸天无敌，万古为尊！　　新一届的柔道冠军Tony（郭富城饰）慕名而来，直指司徒宝挑战，试图一较高下。宿敌辣手李阿刚（梁家辉饰）又因当年一场未完的比赛，也找上门来要和司徒宝决一雌雄。