| http://www.w3.org/ns/prov#value | - Still further, by thepresence of ventilation in a cover, the relative humidity inside and outside of the cover will remain effectively at equilibrium, and thereby the chance of rust developing may be reduced, if not precluded.However, the elements--and particularly rain, snow, and wind--are always present, and therefore it is not appropriate to ventilate a cover merely by the addition of a screen
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