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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.胡宗宪就此点头道，将他们送进舱内吧，好生伺候。Tuberculosis is cured within one year and has good physique and is qualified.随后，周围便沉寂下来。不禁好笑，项羽的女人你也敢打主意。MyDoSth (sender, e);"They need to make a flexible assessment of their systems and ensure that their service providers are ready to deal with potential attacks and can provide them with adequate protection," she concluded.