'lcmb' <name(char<9)>|'!' ['+|-' <line> '+|-' <line> '+|-' -> <line>..(up to 14 lines)]| ['ADD' '+|-' <line> '+|-' <line> -> '+|-' <line>..(up to 14 lines)]This keyword is used to define, extend or redefine a combined line (lcmb). Combined lines are necessary if the edge of a surface should be made of more than one line. Usually the user does not create lcmbs directly. It will be created automatically during the process of defining a surface with the command qsur. There is no limitation to the number of lines in general but with one command not more than 14 lines can be specified. To specify more than that or to extend an existing lcmb a modified command has to follow. For example,