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要把浓度高的农药用水稀释配成所需的药液浓度,可采用简易计算方法求得加水量,即:(原药液的浓度一所需稀释的药液浓度-1)×原药液的重量
To dilute the concentration of pesticides dubbed the required liquid concentration, can be calculated by simple calculation of water, that is: (the concentration of the original liquid concentration of a required liquid concentration -1) × original liquid the weight of