| http://www.w3.org/ns/prov#value | - The housing 12 is preferably a two-piece clamshell design constructed of lightweight, high-impact plastic, or another similarly suitable material, which, when assembled, is substantially sealed (using, e.g., gaskets seals, or other appropriate sealing mechanisms) against water, moisture, dust, and other environmental hazards that might otherwise adversely affect the sensitive components.
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