3503| 31
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有什么簡單分辨常用金屬的方法? |
點評
最便捷,快速的方法就是手持式檢測儀,也準(zhǔn)確。
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點評
買包煙,去當(dāng)?shù)氐洚?dāng)行,叫師傅檢測下,他們回收貴金屬的,一般都有光譜分析儀
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