It provides step-by-step details on the procedure for customizing your database, and includes some hooks on how to control access rights to certain fields.
本文提供了定制数据库过程的一步步的细节内容，并且包括一些如何对某些字段控制访问权限的钩子函数。
2
Stepbystep heating systems, advanced control technology, tail stepby step.
步进式加热系统，先进控制技术，尾部逐层。
3
The paper introduces a method of establishing model using mark flow graph in sequence control system. Then the control is implemented bystep-by-step instruments in PLC.