RPG文件打开可以在RPG初始化阶段隐式发生，也可以通过RPG OPEN操作或在文件定义上使用USROPN关键字显式发生。
The RPG file open can occur implicitly during the RPG initialization phase or explicitly via the RPG open operation and the use of the USROPN keyword on the file definition.
插件方法在文档操作(创建、更新和删除，以下称为CRUD操作)的特定阶段中调用，并且可隐式用于允许或拒绝对象更改。
The plug-in methods are invoked at specific stages of document manipulation (create, update and delete, hereafter called CRUD operations), and are implicitly intended to allow or deny object changes.
介绍了数控式对接机构对接的基本操作过程，建立了对接预捕获阶段仿真的数学模型，并给出了仿真实例。
In this paper, basic operating process of numerical control docking mechanism is introduced. Mathematical model in initial capture period is established and simulation example is given.
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