structural steel
美式
- 結構鋼；型鋼
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相關知識
有沒有人可以幫我改一改文法&改通順一點??(英文好的請進)
...external walls of the building are made from concrete and steel to provide pretection against weather, and to offer sufficient strength to support the floor and...
美式
...external walls of the building are made from concrete and steel to provide pretection against weather, and to offer sufficient strength to support the floor and...