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(四)老电工相传的基础电工口诀，发电机原理，基尔霍夫定律等知识
实用的电工基础口诀，很实用，值得收藏
老电工相传电工基础口诀，对提高电工技能有很大帮助，值得收藏4/8
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实用的电工基础口诀，很实用，值得收藏
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