初始段 meaning in English

initial section
initial segment

3 and y or 8 phases are crystallized at the end . between them exists a pure phase region
晶锭的初始段为+两相区，末段为+或多相区，两段之间为单相区。
The telemetry and control system of xslc ( xichang satellite launch center ) undertakes the task of tracking , measuring and communication control at the early segment after launch vehicle lifts off
目前第二十七试验训练基地测控系统的主要任务是承担卫星发射初始段的跟踪测量和通信控制任务。
Consequently , although the initial part of the unloading stress - strain curve might be approximately linear , this did not mean that the system response was elastic , as frequently assumed in continuum theories
因此，尽管在卸载应力应变曲线的初始段约为线性，但这并不意味着颗粒系统的响应如传统连续力学中假定的那样为弹性。
The controlling force developed by the jets is working at the beginning of the initiative trajectory ( 0 . 385 - 3 . 385s ) to control the attitude of the projectile to keep its axis on the direction of launch - direction , so as to reduce the effect of initial disturbance
控制力由喷流作用力产生，在主动段的初始段( 0 . 385 3 . 385秒)控制弹体的姿态，使弹轴维持在初始方向上，从而减少初始干扰，减小落点散布(飞行时间约170秒) ，提高精度。