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圆柱筒开槽（截交线的画法）——机械制图习题解答
大一的同学们，技职院校的新生们，有没有拿到类似于有“机械制图”的课本，如果有请你先关注我，或许上课以后，我的视频会帮助到你哦！
机械制图习题讲解17/35
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