virtual PAD虚分组装折设备virtualadj.实质的；【计】虚拟的virtual reference services虚拟参考咨询virtual network laboratory虚拟网络实验室virtual construction group虚拟建筑群Virtual prototype teehnolo虚拟样机技术virtual experimental model虚拟实验模型virtual reality technology虚拟现实技术Virtual Machine Identifier虚报机标识符virtual manufacture system虚机制造系统virtual consultant service虚拟咨询virtual of history studies史德