nocturnal emission reflex emission of semen during sleep. thermionic emission the application of heat, such as to a filament, resulting in the emission of electrons and ions. thermionic emission
Which means if the equipment if design to has a high factor of safety, the cost to fabricate the equipment will increase and same to the weight too. But if the equipment is design with low cost and low weight, the factor of safety will be low too.
The C-Factor is a measure of the smoothness of a pipe's interior. All pipes have a roughness that resists water flow and causes a drop in pressure under flowing conditions. The roughness is indicated by a factor we call the C-Factor. The higher the C-Factor, the smoother the inside of the pipe. New plastic pipe would have a very high C-Factor. Old steel pipe would have a much lower C-Factor because of the corrosion that may have occurred within the pipe.