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It began in England in the second half of the 19th century. It was introduced into the European continent in the 1920s and then widely spread in America, Asia and other countries.When the coil is energized, the iron core attracts the armature and the support plate to move down, and the contact points are turned on or off instantly. The piston rod and the lever slowly decrease due to the influence of the blocking nylon. After a certain period of time, the piston rod decreases to a certain position, and the delayed action contact is pushed by the lever to act, which is in an open state, while the moving contact is closed. The delay time of the relay is the time when the coil is energized until the delay contact completes its action. When the coil is powered off, the relay is restored by the recovery action of the spring.非是他小气，实在是青鸾郡主犯了他的忌讳：其一，居然利用娘亲郑氏，虽然最后无事，那也让他无法容忍。《迷》是一部由TVB制作，郑嘉颖、田蕊妮、吴亚坤和赖慰玲主演的香港电视剧。惟惟即将与稳定交往的男友步入礼堂，却在此时遇见克桓，这个男人强势又霸道地闯入惟惟的脑海，从此再也无法删除乾净。但彼此身边都有论及婚嫁的对象，他们不会是情人，甚至连当朋友都不可以！错误的相遇，擦出致命的火花。如果他们不该成为情人，也不能是朋友…那他们，该成为什麽？电视剧《开天辟地》将以中共一大为历史背景，全景展现中国共产党建党前后的风云历程。是由上影英皇打造的建党90周年重点献礼剧》。《笑傲江湖》第五章治伤。