| http://www.w3.org/ns/prov#value | - The other moisture-absorbent materials are not particularly limited, and may include silica gel, alumina gel, activated carbon, zeolite, moisture-absorbent polymer (for example, polyvinyl alcohol, polyacrylamide, and the like), metal salts (for example, magnesium sulfate and other sulfates, calcium carbonate and other carbonates, calcium chloride and other metal chlorides, calcium oxide and other
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