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應(yīng)該是水跡呢
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銅導(dǎo)體有氧化斑點(diǎn):1:拉絲液質(zhì)量問(wèn)題 2:拉絲液濃度過(guò)高 3:絕緣前銅導(dǎo)體表層有水漬(吹干裝置氣壓偏小或預(yù)熱溫度不夠)4:銅材材質(zhì)不好
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