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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.《剑行天下》讲述了江湖中流传的一个古老的传说：有两部奇书《心术》和《法术》，得到者，可以安邦定国平天下，于是江湖中各路豪杰为了追查奇书的下落，展开了一场生与死的较量……Article 3 Fire control technical service institutions and their employees shall follow the principles of objectivity, independence, legality, impartiality, honesty and credit in carrying out social fire control technical service activities.喜剧明星兼演员珍妮·斯蕾特的第一部 Netflix 原创喜剧特辑《怯场》让观众得以一窥这位喜剧演员的内心世界。在这令人捧腹的单口喜剧节目中，穿插着珍妮童年的个人片段和对其家人的采访，近距离审视了她的人生。本特辑于 10 月 22 日面向全球上线，珍妮将讲述自己参加午夜天主教弥撒的经历，以及童年时家里闹鬼的故事；经历了这些也就不怯场了。杨长帆咽了口吐沫，不好再多说。　　播出时间：每周一至周五12：55　　导演以独特的视角除了展示动物之美和自然之美，更多地展开了一种“故事性”的叙述，他对环保问题的深入思索让我们多了一分对经济发展和环保问题的惦念，审视人类活动对海洋