A U-shaped elevator having no doors is provided with first and second latching mechanisms which when contacted by the tubular to be entrapped within the elevator move from a closed position to an open position and which then return to a closed position as soon as the tubular is entrapped within the elevator. The displayed speed indicators are based on a racer’s current speed and target speeds attributed to individual locations along the suggested driving line on the path. Raman spectroscopic data is obtained from the irradiated region. The control circuit includes an oscillator configured to generate a voltage signal shaped like teeth of a saw. As another method, a first ruthenium thin film is deposited using a thermal CVD process and then a second ruthenium thin film is formed on the first ruthenium thin film using a PECVD process. Further, each of the curvatures of the first, second and third surfaces is arranged to satisfy the following formulas,RC=BC+7.