未预变形az61镁合金不宜进行半固态制坯。
Original AZ61 magnesium alloy does not fit to the requirements of semi-solid forming.
预包装好的熟食肉如果保持未开封，则有较长的货架期。
Prepackaged deli meats have a long shelf life if they remain unopened.
研究了预塑变对爆轰处理和未爆轰处理样品的强度、表面残留应力、氢脆敏感性及其关系的影响。
Investigation was made of effect of preplastic deformation for unexplosive and explosive treatments on strength, surface residual stress and hydrogen embrittlement of the specimens.
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