阶段

This paper explains the technical points of back-faced sliding movement in putting the shot in its six phases such as preliminary pose, sliding movement, final forcing posture, transition, skillful push and horizontal sustainment and then makes a detailed study and analysis of the techniques.

本文对背向滑步推铅球的预备姿势、滑步阶段、最后用力姿势、过渡阶段、出手阶段和维持平衡阶段等六个阶段的技术要点做了阐述，并对其作了详细的分析研究。

Completion of the project is divided into four stages, namely: First, needs analysis and program design; Second, research and development phase of the extension; third, system integration, testing and perfecting stage; four, testing, trial production and delivery stages.

整个项目分成四个阶段完成，分别是：一、需求分析和方案设计阶段；二、分机研制开发阶段；三、系统集成、测试及完善阶段；四、检测、试产及交付阶段。

Three stages of measurement need to be done: the stage of limited speed, the stage of car testing and the stage of monitoring.

首先要对列车进行3个阶段的测试，即限速阶段、试验车测试阶段、监测阶段，测试每个阶段中钢轨的内、外轨垂直力和横向力；