| http://www.w3.org/ns/prov#value | - According to yet other aspects, the cover may be formed, such as by molding, e.g. plastic molding injection, or stamping, and may be formed from a rigid material, such a metal or plastic, including thermoplastics, or may be formed from a semi-rigid material, such as an elastomeric polymer, or from a non-rigid material, such a rubber or an elastomeric material, including a silicone based material.
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