A system and method of using manufacturing states in a manufacturing process is provided in which manufacturing states for an article of manufacture are defined at different time periods of a manufacturing process for display as manufacturing contexts relating to an installation plan. The mobile phone may be configured to detect events such as the mobile phone being turned off or a battery being removed. The valve piston is also acted upon in the closing direction via a second end face by the pressure of the higher-pressure working connection. A mover is provided for moving the medicament carrier relative to the housing so as to bring successive medicament retainers individually into communication with the airway. Thus, by superposition, substantially all of the optical energy from the extended light source is coupled onto the secondary focal point. The cleaning device of the present invention provides an easier and more convenient way of cleaning vertical blinds.