[問題] 第二組基準
小妹剛進新公司學習,有問題想請教各位先進
附圖如下:
http://i.imgur.com/Fo4ez9W.jpg

網路上查不太到相關資料
想請教
(1)是否為第二組基準
(2)如為是,請問量測方式為何?
小妹認知是定在幾何公差上的為第二組基準,但搞不太懂要怎麽量測,還請神人指點一下
,感謝~!
小問題,還請包涵><
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