结论MR I可以早期显示手臂振动病的骨关节改变，明显早于X射线；

Conclusion MRI can display bone and joint diseases of vibration much earlier than X-ray does.

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研究手臂振动暴露水平与健康危害程度的关系，为铁矿振动危险度评价提供流行病学资料；

Study the correlation of hand-transmitted vibration and it's hazards, provide epidemiology evidence for risk evaluation of vibration;

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研究手臂振动暴露水平与健康危害程度的关系，为铁矿振动危险度评价提供流行病学资料；

Study the correlation of hand-transmitted vibration and it's hazards, provide epidemiology evidence for risk evaluation of vibration;

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