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(1) Normal detection of contacts. The normal detection of contacts refers to the detection of contacts when the control coil is not energized. The normally open contacts are open with infinite resistance, and the normally closed contacts are closed with resistance close to 0. The normal detection of the normally open contacts of the time relay is shown in the following figure.Public class Minus extensions AbstractCalculator implements ICalculator {这是一部关于法国情报员的电视剧。 在对外安全总局内部，有一个叫做传奇办公室（BDL）的部门，远程操控着法国情报部门最重要的工作人员：地下工作者。潜入敌对国家，他们的任务就是找出那些有可能被征集作为情报来源的人。在“传说中”的阴影下工作，也就是说以他们虚构的身份，戴着面具生活了好多年。 在大马士革（叙利亚 首都）六年的秘密任务回来之后，我们的主人公-代号Malotru我们更熟悉一些，在BDL内部升职了，并且逐渐重回他真正的生活。但他似乎没有从在叙利亚生活时的传说和身份中跳出来。　陕北黄土高原上的贫苦女孩翠巧，自小由父亲作主定下娃娃亲。八路军文工团团员顾青，为采集民歌来到翠巧家，一段时间后，与翠巧家彼此仿佛自家人般。顾青讲述起延安妇女婚姻自主的情况，翠巧听后，心生向往。心下不禁疑惑，不过也没有过多询问，说道：嗯，是有点事情。Events replace the work that could only be performed by the scheduled tasks of the operating system, and MySQL's event scheduler can be accurate to one task per second, while the scheduled tasks of the operating system (such as CRON under Linux or task planning under Windows) can only be accurate to one task per minute.