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哪位大哥教教小弟怎么看磁芯的物理尺寸。od,id,hgt,mean length,cross sect,volume都分别是什么啊?哪种是双孔磁芯?
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谢谢bg2raq 的提醒,我问了是17.5元一只,而且定货要2周才到,我叫他帮我带着订20只,那么贵要的公司还有好几家。。
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