prov:value
| - In effect, the seals and valves can be comprised of such synthetic resins as polyurethanes, ethylene vinyl acetate copolymers, polyvinyl chlorides, polysilicones, polyamides, such as nylon, polyethylene, including those of the high density, low density, intermediate density and linear low density variety, ethylene ??-lefin copolymers (such as ethylene propylene copolymers), polyesters, polycarbona
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