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The essential oils from Saussurea tridactyla were extracted by steam distillation. The chemical components of the essential oils were analyzed by GC/MS, and 23 compounds were identified, which account for 90% of the total essential oils. 相似文献
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本文将阐述中波调幅广播发射机的工作原理,依托相关原理明确数据采集系统的总体设计方向,明确关键组成部分ARM微处理器的关键效用,探究基于ARM7微处理器的体系结构设计方案,最后通过试验证实方案的可行性和有效性。 相似文献
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