| http://www.w3.org/ns/prov#value | - The suitability and durability of materials used for parts, the failure of which could adversely affect safety, must -- (a) Be established on the basis of experience or tests; (b) Meet approved specifications that ensure their having the strength and other properties assumed in the design data; and (c) Take into account the effects of environmental conditions, such as temperature and humidity, exp
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