SPSS Data: The efficiency of traditional, double pipe, modified stove, and combination of modified stove and double pipe distillation.

The efficiency of traditional, double pipe, modified stove, and combination of modified stove and double pipe distillation传统蒸馏法、双管蒸馏法（double pipe distillation）、改良炉式蒸馏法，以及改良炉式蒸馏与双管蒸馏结合法的效能