Top, the calcinator in the sodium tripolyphosphate plant; above, the atomic absorption spectrophotometer, being used in the laboratory.
(上)焙烧机一角。(下)检验室中的原子吸光谱机。
Top, the calcinator in the sodium tripolyphosphate plant; above, the atomic absorption spectrophotometer, being used in the laboratory.
(上)焙烧机一角。(下)检验室中的原子吸光谱机。
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