trolley beam 中文意思是什麼
trolley beam
解釋
吊重梁-
Model board trolley is a non - standard large mechanical equipment for tunnel construction, its main frame is a plate and beam element constructed steel structure
模板臺車是隧道施工中二次襯砌用的一種大型非標機械設備,其主體結構是板梁結合的鋼結構。
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