use weight analysis (4.2.1.3.6) containing the prototype weigh about 0, 03 g Dah chaatsst glyphosate, accurate to 0, 00001g to 10 ml flask (4.2.1.3.1), dissolve and norm tớivaạch with solvent mix (4.2.1.2.6), shake the ultrasound to eliminate air bubbles before the pump into the air
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