| http://www.w3.org/ns/prov#value | - When this electrochemical element is used as a fuel cell, the fuel thereof can be hydrogen or a fuel based on an alcohol such as methanol or ethanol, based on an ether such as dimethyl ether or diethyl ether, or based on a hydrocarbon such as methane, ethane, propane, or butane, or can be gasoline or the like.
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