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US spectrum 450 ppm NO3-N standard, 6-14ml bottle
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American spectrum 34 ppm NO3-N standard, 6-14mL bottle
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American spectrum soil K+kit, containing 30 samples
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American Spectrum Soil Sodium+Kit, containing 30 samples
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Spectrum 150 PPM K standard deionized water from the United States
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American spectrum 2000 PPM potassium+standard deionized water
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Add 60 milliliters of solutions with pH values of 4 and 7 to the American spectrum each time.
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American spectrum conductivity standard, 1.41 mS/cm, 250mL
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American spectrum pH value 4 standard -250mL
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Spectrum handheld plant juice hydraulic press from the United States
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American spectrum pH value 7 standard -250mL
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