| http://www.w3.org/ns/prov#value | - It is preferred that the housing 110 be constructed of a thermoplastic polymer such as polyethylene, acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC), cellulose acetate butyrate (CAB), vinylidene chloride, fluorocarbons, polycarbonates, polypropylenes, nylons, and acetals.
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