前端面 meaning in Chinese

front face

In chapter 3 , the method of modeling the sweeping of the assembly part in the assembly process is discussed . envelope surface is clarified as front envelope surface , rear envelope surface and sweeping envelope surface
第三章分析了装配过程零件包络面构成，并将包络面分解为前端面、扫掠包络面、后端面三部分。
Theoretical model of self - mixing interference in a linear frequency modulated laserdiode is presented by using the dynamic theory of semiconductor laser with weak external optical feedback . the characteristics of oscillation frequency shift and output power changes of the laser diode are analyzed by using the theoretical model . the absolute distance from front facet of laser diode to target can be found by measuring spectrum of output power of the laser diode
使用半导体激光器在弱反馈条件下的动力学理论,建立了线性调频半导体激光器的自混频干涉理论模型.基于该模型,分析了激光器振荡频率偏移与输出功率变化特性.通过测量激光器输出功率谱,可以得到激光器前端面与被测目标之间的距离