本论文以大量的野外调研为基础，结合现场试验和室内试验数据，对黄土暗穴的特征、成因机制、分布规律进行了较深入地研究。
Based on the field investigation and test data, this thesis studies profoundly on the characteristic, the origin mechanism and the characteristic of distribution of loess hidden cavity.
分析了柴油机缸套穴蚀形成原因、特征及其影响因素。
Analyses the formation reasons, common characteristics and influence factors of diesel engine cylinder bore cavitation.
在对蒜瓣外形特征进行测量并统计研究等基础上，设计了旋转式蒜瓣单粒定向取种器的关键部件-仿生种穴排种盘的结构形式。
Based on measuring, statistics and research on configurational characteristics of garlic clove, the key component of rotary garlic single-clove directional seed metering device is designed.
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