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PROBLEM TO BE SOLVED : To provide a high-strength magnesium alloy material from which near-net-shape parts having a size above a certain level can be formed in a short period of time without deteriorating the strength of the alloy, its manufacturing method and a high-strength magnesium alloy member composed of such a material. SOLUTION : A molten magnesium alloy represented e.g. by Mg-aZn-bRE (wherein, symbols (a) and (b) satisfy 0
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