They may have heated the mammal bones before crushing them, to enhance the extraction of the marrow fat.
他们可能会在粉碎哺乳动物的骨骼前先加热它们来提高骨髓脂肪的提取。
The ultrasound extraction technology and composition analysis of honeybee pupa fat were studied in this test.
利用超声波技术对蜂蛹脂肪的提取工艺进行了研究，并对蜂蛹脂肪酸的成分进行了分析。
The influences of ultrasonic frequency, ultrasonic time and solvent content on the extraction rate of fat oil in Elaeagnus angus-tifolia L. were studied. The optimum extraction condition was obtained.
用均匀设计法考察超声频率、超声时间和溶剂用量对沙枣油提取率的影响，得到提取沙枣油的优化超声工艺条件。
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