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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.Plant name: Aloe vera! show_style();。田地也皆是乡亲们诚心挂靠的。吕雉深知一点，若是此战救不出儿子，待项羽回来，说不定就会杀之泄愤。科研小组的学生王睿在一次试验中穿越到2050年见到未来的自己，未来世界因生物机器人异变而面临巨大的危机，为了解决这一问题，王睿回到2015潜心研究，然而研究成果却被同伴盗用。为了解决同伴与自己的心结，王睿再次穿越回2005年，欲从源头挽回一切。待一切轨迹被改写，生物机器人危机却依旧未解决。这时王睿才从蛛丝马迹中发现，未来的自己是否并非真实的自己。挚爱之人只是牵线木偶，光明的未来化为泡影，王睿究竟该如何挽回自己的人生？又该如何解决人类的危机？