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The creepage distance is divided into two grades, and the creepage distance of 300V grade is ≥ 5 mm; Creepage distance of 600V grade ≥ 7mm. The creepage distance is designed for 220V voltage according to 300V grade, and the creepage distance is designed for 380V voltage according to 600V grade. For 220V and 380V high-power parts, character marks are applied to allow cuts in PCB design to meet the requirements of creepage distance.该剧讲述年幼时期在一起度过的二人，经历过时间的洗练，渐渐从对方身上感受到爱情的故事。《刑警队长》采用“大题小做”的创作手法，以生活化的视角描绘了经常接触社会阴暗面，时刻和犯罪分子交锋的公安刑警，把这些平民英雄工作中的辛劳和担当，生活中的牺牲和取舍展现的淋漓尽致。男人如同饿狼一般，两眼冒着绿光。高端牙科诊所的牙医程皓业余时间经常帮别人出谋划策追女孩，追女孩有无数种方法的他却还没有恋爱过。受过情伤专治各种渣男的罗玥来看牙病，偶遇程皓，两人冤家路窄。两个彼此讨厌的人，开始了一段啼笑皆非的情感追逐战。程皓的合伙人张铭阳动了真心让程皓帮忙追一个女孩，而这个女孩竟是程皓曾经的暗恋对象。程皓的朋友邹北业让程皓出主意追一个女模特。三个遇到不同情感问题的男人成了铁三角，最终他们都找到了最合适自己的另一半，同时也收获了成长。931年，魔都“上海”。In the CR process, the code author should explain and the reviewer should ask questions. Reviewers should not only ask questions when problems are found, but also require code authors to explain a specific problem according to the content of this review.