| http://www.w3.org/ns/prov#value | - When the bottom wall 30a of the case or the whole case is made of a metallic material, such as a magnesium alloy or an aluminum alloy, the wall 30a itself acts as a heat radiating fin, or a wide area formed at the wall 30a may be utilized as a heat radiating face, so that a high heat radiating performance may be obtained.
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