A vent head for a steam system is provided. A synonym substitution mechanism may programmatically replace selected words in textual data with synonyms for the selected words. The vehicle also includes two cylinders for exerting a force on the tailgate with respect to the body. During an actual mold closing operation, the physical value related to mold closing operation is periodically detected in the monitor region, and a deviation between the detected physical value and the determined theoretical value is calculated. The amount of armchair single-wall carbon nanotubes in the electrical conductor can be greater than 10%, greater than 30%, greater than 50%, greater than 75%, and greater than 90%, of the single-wall carbon nanotubes in the electrical conductor.