]Mazị Lu bụ onye na-emepụta ihe na-arụ ọrụ na sistemu spectrometry dị iche iche na ngwa nnwale dị iche iche, yana nwee mmekọrịta mmekọrịta yana nnukwu akaụntụ. S&A Teyu, onye na-arụ ọrụ nnwale.
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