但是这样方法是粗糙的。
There are two method to measure the weight ratio of crude benzene.
测定粗苯重量比，有色谱法和蒸馏法两种方法，其中蒸馏法为仲裁方法。
The application results in a crude unit show that this method is valid.
某厂常减压蒸馏装置的实际应用结果表明了该方法的有效性。
Objective: To develop a new identification and analysis method of crude drug Pheretima.
目的：建立中药材广地龙的鉴定新分析方法。
Objective: To develop a new identification and analysis method of crude drug Pheretima.
目的：建立中药材广地龙的鉴定新分析方法。
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