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.

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。

youdao

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

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。

youdao

In view of old bridge bearing needed to be replaced, the paper expounds how to research and develop intelligent automation engineering equipment for Bridges synchronous jacking up.

针对桥梁支座日久老化急需更换的问题，提出了研制智能化、自动化桥梁同步顶升工程装备。

youdao