The scanning is performed from its lower position upwards through the &quot; cut-off &quot; line along the vertical lines at −3° to −1.5° and +1.5° to +3° from the V-V line.
The scanning is performed from its lower position upwards through the &quot; cut-off &quot; line along the vertical lines at −3° to −1.5° and +1.5° to +3° from the V-V line.