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對(duì)于有對(duì)稱(chēng)要求的圖紙,,對(duì)稱(chēng)基準(zhǔn)可以不是中心嗎,? |
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點(diǎn)評(píng)
B基準(zhǔn)應(yīng)該是31.8的中心線
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