concat file.g string
This command will concatenate another MGED file "file.g" onto the present object data file. If "string" is present, all names in "file.g" will be prefixed with this string. No objects from "file.g" will be added if the name already occurs in the current object file...the object names will be listed and skipped. However, this command should be used in conjunction with the "dup" command to eliminate any problems with duplicate names.