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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.　　吕不韦甫入邯郸，即被赵国严密监视，先是宅邸被围，继而公子赵政神秘失踪，吕不韦临危Finally, refuting the 10,000-hour law can play a clever thought game, which is the Sand Paradox put forward by the ancient Greek philosopher Eubulides:《我家厨房》是北京旅游卫视全新打造的微剧。每集25分钟，一共12集，每集讲述一个独立成篇的故事，故事都发生在名为"我家厨房"的小餐馆。餐馆的老板是一位沉默温和的中年大叔，他经营着一家只要有客人就不打烊的小店。该剧以店老板的视角讲述了餐馆过往食客的故事，每一集重点介绍一道简单别致的食物，并着重讲述一个与该食物相关联的人物故事，用美味食物折射出许多人不同的人生状态，剧情设置可谓另辟蹊径。AI is in the current air outlet, so many people want to fish in troubled waters and get a piece of the action. However, many people may not even know what AI is. The connection and difference between AI, in-depth learning, machine learning, data mining and data analysis are also unclear. As a result, many training courses have sprung up, which cost a lot of money to teach demo and adjust the participants. They have taught you to study engineers quickly and deeply in one month, making a lot of money. We should abandon this kind of industry atmosphere! In my opinion, any AI training currently on the market is not worth attending! Don't give money to others, won't it hurt? -However, when everyone taught themselves, they did not know where to start. I got a lot of data, ran a lot of demo, reported a lot of cousera, adjusted the parameters, and looked at the good results of the model. I thought I had entered the door. Sorry, sorry, I spoke directly. Maybe you even sank the door. In my opinion, there are several levels of in-depth study of this area: (ignore the name you have chosen at random-)I was very impressed by what happened later, After the flame was ejected, two to four short-lived salamanders were formed in the air. But the area covered is not large, But the big wasp was obviously afraid of the high temperature, After seeing the salamanders coming up, they withdrew to both sides like crazy. At that time unexpectedly in the air to get out of the way of two 'gap', We were shooting and watching, In fact, I have no idea, Because the '74 spray' is used to spray so many big wasps flying around in the air, The efficiency is very low when you think about it. But that's when the miracle happened, Although the flame has a short range, For a short period of time, However, due to the sudden injection, So it still ignited dozens of big wasps, These big wasps are more flammable than gasoline when exposed to flames, Immediately turned into "small fireballs" flying in the air, However, the temperature of the '74 spray' flame was quite high. I once saw a Vietnamese soldier with a full face sprayed directly by it. It was not burned to death by the flame, but melted directly on the spot. It really melted away, leaving no ash left, leaving a scorched black mark on the place where he was sprayed.