... 空心铆钉 tubular rivet 管鹰架 tubular scaffoldings 管支柱 tubular strut ...
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钢管鹰架 Tubular steel falsework
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在摇晃的鹰架和管架上作业，且在中部和上部未安装护栏。
Working from swinging scaffolds and "Tube Lox" scaffold not equipped with mid and top rail.
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