The mobility The average at the highest level (x = 4.53, SD = .743)
Cost of production (x = 4.47, SD = .743), ease of maintenance and storage (x = 4.47, SD =. 743) are durable in use (x = 4.40, SD = .632), with the application of resources, value for money (x = 4.27, SD = .961) and can be easily produced (x = 3.93, SD =. 0.704)
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