该图所示为（）类零件。<img src=https://huaweicloudobs.ahjxjy.cn/9E62863FFFE6B0B300A3D397A86163F1.png title=图片10.png alt=图片10.png style=width: 389px; height: 259px; width=389 height=259/>

【单选题】【消耗次数：1】

① 轴

② 主视图

③ 剖面图

④ 普通粗牙

参考答案：

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