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"Exposure compensation is also called EV, which is an abbreviation of Exposure Values and a quantity reflecting the amount of exposure. EV +/-commonly known as exposure compensation, it was originally defined as: when the sensitivity is ISO 100, the aperture coefficient is F1, and the exposure time is 1 second, the exposure is defined as 0, the exposure is reduced by one gear (the shutter time is reduced by half or the aperture is reduced by one gear), and the EV value is increased by 1. Increasing and decreasing exposure compensation depends on adjusting the rocker. The shooting environment is relatively dim and needs to increase brightness. When the flash cannot work, the exposure can be compensated and the exposure can be appropriately increased. "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.123. X.X.126黑礁将以OVA形式推出第三季，剧情主要以Lovelace家族的女佣、前任哥伦比亚革命军的恐怖份子“弗罗伦西亚的猎犬”-罗贝尔特为主线，收养她的Lovelace家族主人在一起由NSA策划的爆炸中死亡，罗贝尔特为了展开复仇再次走上了血路。中国教父陈庭威将面对另一股黑帮势力徐少强的挑战。王薇的出现，使两人的恩怨更趋白热化，掀起江湖上无休止的腥风血雨。本剧不惜斥巨资赴广州拍摄外景，力求重拾旧中国英雄地的面貌。黑帮仇杀，枪战及 爆炸场面亦经过精心设计，枪炮子弹及临时演员耗用不菲，制作认真、 谨严，是一部不容错过的佳作。我可以等。该剧将讲述从未想要当个乖女儿、好儿媳、好太太却不得不背负着一切的国家选手级超级女人林致雨以及对自己而言家人就是奢侈的崔镇宥一路寻找爱与家庭的奋斗故事。