A jack stand for use with a power unit having a slide forward bridge for positioning by the jack stand; and having a pair of leveling pads with inner roller bearings thereon for engaging an upper lifting plate of the jack stand, and a bottom plate having openings therein for engaging a mobile rack for transporting the jack stands. The call-related features are Name, Area Code, Time, and Route, and there is also provision for a Default value. Through analyzing JavaScript information in web page codes, the above technical scheme obtains function that include Ajax call in the web page codes and further triggers the function to obtain web page content generated thereby, thus achieving retrieval of dynamic content in an Ajax web page. An actuator urges the brake shoe against the wire and thereby brakes the wire as it exits the output end. By taking into account a setpoint temperature Tsetpoint of the internal combustion engine which depends on external and internal boundary conditions when controlling andor regulating temperature-dependent functions of the internal combustion engine, fuel consumption and emission characteristics of the internal combustion engine are improved. The laser beam is applied such that an incident direction at an irradiation position on the joining member does not include components toward the interior of the frame member while the laser beam moves relative to the temporary assembly.