制图中的d、e、a全称是什么?像l代表line…还可以介绍其他的吗答:DBC, *DBCONNECT DC, *ADCENTER DCE, *DIMCENTER DCENTER, *ADCENTER DCO, *DIMCONTINUE DDA, *DIMDISASSOCIATE DDI, *DIMDIAMETER DED, *DIMEDIT DI, *DIST DIV, *DIVIDE DJO, *DIMJOGGED DLI, *DIMLINEAR DO, *DONUT DOR, *DIMORDINATE DOV, ...