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Time relays can be divided into AC relays and DC relays according to different power supply requirements, which are respectively used in AC circuits and DC circuits. Time relays can be divided into power-on delay relays and power-off delay relays according to different functions. Time relays can be divided into sealed relays, small relays and micro relays according to their shapes. In addition to the above classification of time relays, time relays also include special types of relays such as resonant relays, stepping relays, proportional relays, etc.或许正是因此，后来秦国在统一过程中或许少了某种阻力。Surgery and internal medicine are similar to general hospital physical examination, and the passing rate of initial examination is generally relatively high.当时那个女子不想跟他周旋，因为一心想要走。先生教训的是，今日本官无权分田。第3季将探索弗兰克林的音乐天赋,无与伦比的职业生涯以及她对世界各地音乐和文化产生的不可估量和持久的深远影响。她是一位福音神童和直言不讳的民权捍卫者,被广泛认为是过去50年间最伟大的歌手,而其获得的荣誉更是无数。