2884| 5
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關(guān)于覆銅板剪切質(zhì)量的問(wèn)題,求指導(dǎo)! |
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點(diǎn)評(píng)
關(guān)鍵它是復(fù)合板,一個(gè)斷面有兩種材質(zhì)
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