The steam distillation was applied in three steps.

三步反应在后处理时均采用水蒸汽蒸馏。

Method: The essential oil was extracted by steam distillation.

方法：采用水蒸汽蒸馏法提取挥发油。

METHODS :The essential oil was extracted by steam distillation.

方法：采用水蒸汽蒸馏法提取挥发油。

The essential oil from wood was extracted by steam distillation.

采用水蒸气蒸馏法提取木粉中的精油；

Methods The volatile oil was obtained from PPFA by steam distillation.

方法采用水蒸气蒸馏法从枳壳中提取挥发油。