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The digital + intelligent forces formed by AI-CPS OS stimulate economic growth in three ways: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.Under the guidance of these three points, writing classes and programs began to "design" ^ _ ^.娘今日趁着赵尚书小儿抓周的机会，去见了玄武王母亲。There are three main reasons for the peculiar smell of automobile air conditioners. First, there is exhaust gas leakage from the external engine and foreign matter in the air inlet, which leads to unpleasant smell from the air inlet of the air conditioner. In this case, it is very good to check and go to the repair shop to open the cover for inspection, which can be clearly seen. Second, the air conditioning filter element is too dirty. Regular cleaning and inspection can completely prevent the occurrence of peculiar smell. Third, the air conditioning pipes and evaporators are caused by mold, which is also more troublesome and expensive to maintain. The first two situations are relatively simple and easy to check. The following focuses on the third reason, why mold can be produced in pipelines and evaporators. The following master will give you a brief introduction.讲述了一个黑帮老大遇到一个伤心男孩的故事萧何几乎有些恼了，说道：汉王，臣不是这个意思，见微知著，从管理粮仓这件事情就看得出这个韩信有能力。