为改进柏木油香气质量，主张以水蒸汽蒸馏技术取代水上蒸馏法，不赞成用干馏法或“红锅”法来制取柏木原油。
In order to improve the odour quality of cedar wood oil , the water distillation ( over water boiler ) should be replaced by steam distillation .
干馏法