The systems are packaged in three basic models: desktop, deskside and rack-mount.该系统有三种机型：桌上型、桌边型和架上型。We pooled our savings and bought a desk-top computer.我们用积蓄合资买了一台桌上型电脑。The casings of desktop computers are basically made by the extrusion of aluminums.桌上型电脑的机壳基本上是用铝挤压成型的方式做成的。