5393| 8
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圖紙上標(biāo)示M60*3(精度2級(jí),,R0.3)代表什么,,其中R是哪里 |
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點(diǎn)評(píng)
那也應(yīng)該是C0.3
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點(diǎn)評(píng)
正解
評(píng)分
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