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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.全剧以主人公宝生的一生为叙事线索，讲述了他从童年到老年二十个相互关联又相互独立的故事，二十个故事几乎涉猎了本世纪中发生的所有重大历史事件，从世纪初叶的南方小镇到四十年代的京城，从繁华一梦的旧上海到改革开放的深圳，辐射面极广地展示出不同时代所带给普通百姓的喜怒哀乐，从家庭的角度深刻地折射出时代的发展与变迁，而每一个故事又都娓娓道来，细致入微地刻划出一个个富有时代色彩、个性鲜明的艺术形象，从而形成一幅二十世纪中国人文景观的“清明上河图”。Condition 3 2725.70672　　不久，一艘渔船在“探索一号”工作船的测试海域意外打捞起一个神秘的海底装置——“水母”。深海研究员立即组成以副总工程师岳诚为首的科研小组。却一点不忸怩作态，反而满脸好奇地四处打量。Public class Storage {First, how to wrap the text in MindManager mind map?