这类损伤大多是由于维护不当诸如在顶升垫以外的位置顶升飞机或使用工具或地面设备(拖车)撞击飞机造成的。

This damage often is caused by improper maintenance practices such as jacking adjacent to a jack pad or an inadvertent impact with tools or ground-support equipment e. g.

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对顶升方案、设备、技术、施工、注意事项及取得的效果等作了较详细的阐述。

Details are presented on jacking schemes, equipment, techniques, construction, key points and the results.

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