| http://www.w3.org/ns/prov#value | - As a material for the movable member, it is preferable to use highly durable metal, such as silver, nickel, gold, iron, titanium, aluminum, platinum, tantalum, stainless steel, or phosphor bronze, or alloys thereof, or resin having acrylonitrile, butadiene, styrene or other nitrile group, resin having polyamide or other amide group, resin having polycarbonate or other carboxyl group, resin having
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