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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.虽说安桐不曾怪罪，但李副将总觉得大失面子，为了将功折罪，找回脸面，青石沟进军就必须要做好。Some related concepts are described here first.杜宇叹道。One comment, one click to read潘是个勤奋的人。自从他父母去世后，他辍学开始工作来养活自己和他的小弟弟。潘先生在他租来的房子前开了一个露天货摊，但几乎入不敷出。那是在他的一个顾客招募他为他朋友拥有的一家酒店当厨师之前。酒店老板通(音)是一位年轻而头脑发热的商人。他们实际上以前见过面，他们对彼此的印象不好。当潘发现通是这家旅馆的老板时，他立即拒绝在那里工作。然而，通要求他做这项工作，他不想被人看不起，所以决定接受这个职位。通一尝就喜欢上了潘的菜，但又不想丢脸，就跟潘说菜难吃。这两个人见面总是打架。但是过了一段时间，他们每天的争吵发展成了一些特别的事情Cui Yong, who killed for the first time, saw that Baud was covered in blood. He was excited to go to the ground and wiped the blood on his face, shouting, "I'm stained with blood, I'm stained with blood!"