该零件尺寸主基准是轴心线和（）。<img src=https://huaweicloudobs.ahjxjy.cn/9E62863FFFE6B0B300A3D397A86163F1.png title=图片10.png alt=图片10.png style=width: 388px; height: 250px; width=388 height=250/>

【单选题】【消耗次数：1】

① 左端面

② 右端面

③ 圆柱表面

④ 通孔

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