Reference values of the serving angles of the racket with different speed and height were provided.
给出以不同初速度和高度发球时球拍角度的参考值。
Objective: Measuring the secure depths and angles of Yamen acupoint with three-dimensional positioning MRI to provide the reference datas of secure depths and angles for clinic.
目的：通过使用三维定位MRI测量哑门穴进针的安全深度、角度，为临床提供安全针刺深度和角度的参考数据防止意外事故发生。
The paper shows the clear relationship between the reference planes for the nominal angles of the cutting tool and the planes for the working angles of the cutting tool.
给出了刀具标注角度参考系平面与工作角度参考系平面之间的关系式。
Principles of reasonable values and reference data of saw tooth's rake, relief, wedge angles and radius of bottom arc can be determined through finite element method of calculation and optimum design.
通过有限单元法计算和优化设计，确定锯片齿形前角、后角、楔角及槽底圆弧半径合理值的原则及其参考值。
Objective To measure the convergence angles of natural anterior teeth so that to attain the reference, and provide basis for clinical use.
目的通过测量60付自然恒牙列模型，获取自然前牙牙体聚合度的正常值，补充国人牙体测量方面的数据并为临床应用提供参考。
Objective To measure the convergence angles of natural anterior teeth so that to attain the reference, and provide basis for clinical use.
目的通过测量60付自然恒牙列模型，获取自然前牙牙体聚合度的正常值，补充国人牙体测量方面的数据并为临床应用提供参考。
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