关于AutoCAD的arm对象，签章组建，防伪识别，加密验证，需要好好的看看哦。-Arm of the AutoCAD object , the signature form , security identification , encryption, authentication , see the need for good oh .

关于autocad 二次开发的，组建对象的开发程序，关于签章组建的设计与开发。-Autocad secondary development on the formation of object development process , established on the signature design and development .