bridge girder crane
... beam bridge type crane 双架桥式起重机 bridge girder crane 钢梁起重机 bridge c crane 桥式吊机 ...
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几秒钟的警报也能够挽救建筑地盘上的生命，例如让工人抓住钢梁或者把起重机移到较安全的位置。
A few seconds' warning could also save lives on construction sites, allowing, for example, workers to grip girders or move cranes to safer positions.
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起重机将几根钢梁吊上了房顶。
The crane lifted some steel beams to the top of the structure.
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