| http://www.w3.org/ns/prov#value | - Plastic materials particularly suitable for the fabrication of semi-flexible plastic reservoirs include polyvinyl chloride compositions and polyolefins such as polyethylene, low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), ethylene-propylene copolymers, polypropylene as well as blends or alloys thereof as well as cellulose acetates, polyesters, polyurethanes, nylons and co
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