| http://www.w3.org/ns/prov#value | - The mirror covers in the preferred embodiments of the invention, like the shells 4 and 5, are molded of thermoplastic material, such as polystyrene, methyl methacrylate or other suitable materials, so that a plastic solvent, such as toluene in the case of polystyrene, may be used to weld or fuse the mirror covers to the body shells in fluid-tight and moisture-proof manner.
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