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The essential oil volume was 1.57% and 0.02% extracted from Chinese fir and Eucalyptusgreen wood, respectively, by steaming distillation method. 採用水蒸汽蒸餾法，獲得杉木生材精油的得油率爲1.57％，尾葉桉生材精油的得油率爲0.02％。