Researches on Morphology and Anatomy of Root System of Dendrobium nobile Lindl.
金钗石斛根系的形态及解剖学研究。
PURPOSE: to investigate the effect of root canal anatomy in maxillary first premolars on root canal treatment difficulty.
目的：探讨上颌第一前磨牙的根管解剖形态对根管治疗术难度的影响。
The anatomy of a gadget is very simple: the root document node is a "module" containing a "moduleprefs" element, "userpref" elements, and "content". Gadgets provide several interesting features, e.g.
Gadget的内部构造非常简单：文档的根节点“module”包含一个“moduleprefs”元素，若干“userpref”元素和一个“content”元素。
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