The findings demonstrated that: Strength of muscles, especially power and contraction velocity, are declined with aging. It is directly associated with loss of daily living and self-care abilities.
经分析得出结论：肌肉的力量，尤其是爆发力和收缩速度随年龄增长而衰退，而这种衰退与老年人的活动能力和自理能力的丧失直接相关。
The self-compensated contraction caused by graphite dilatation in the solidification process of nodular cast iron makes casting with less flow-off or casting without flow-off possible.
利用球墨铸铁凝固过程中的石墨化膨胀，进行自身补缩，可以实现少胃口或无冒口铸造。
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