2449| 15
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圖紙中熱處理硬度的正確標(biāo)注 |
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點(diǎn)評(píng)
人家說(shuō)的是數(shù)值和硬度標(biāo)識(shí)誰(shuí)在前誰(shuí)在后,不是HRC,HRB,HRA的區(qū)別
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