W/V%, ppm(質量濃度), mg/L, ppb(質量濃度), ppt(質量濃度). 1W/V%, 1, 10,000, 10,000, 10,000,000, 10,000,000,000. 1ppm, 0.0001, 1, 1, 1,000, 1,000,000.
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