青云翻译

Respectively, with 20ml water, 30ml ether - n-butanol (2 +1)-mixed solution, rinse the beaker

Using 20ml water, 30mL ether-and n-butanol (2+1) mixed liquor washing beakers

And uses the 20ml water, the 30ml ether - normal butyl alcohol (2+1) to mix the solution flushing beaker separately

and used respectively 20 ML water, 30 ml ether-N-Butanol is (2 + 1) Mixed solution rinse beaker

Using 20ml water, 30mL ether-and n-butanol (2+1) mixed liquor washing beakers