Abstract:
Systems and indicators of cleaning effectiveness are provided for deployment in an environment where samples of different vacuum cleaners are displayed for consideration by potential purchasers or renters of such vacuum cleaners to facilitate comparisons of cleaning effectiveness between or among the different vacuum cleaners.
Abstract:
Systems and indicators of cleaning effectiveness are provided for deployment in an environment where samples of different vacuum cleaners are displayed for consideration by potential purchasers or renters of such vacuum cleaners to facilitate comparisons of cleaning effectiveness between or among the different vacuum cleaners.