工厂里到处都有铁柱子支撑着屋顶。
Mills have iron pillars all over the place holding up the roof.
工厂里四处都立有铁柱支撑着房顶。
Mills have iron pillars all over the place holding up the roof .
因为这里是幼林,而铁柱是老的。
这栋现存的工业建筑结构为铁柱结构。
The existing industrial building has a cast iron column structure.
铁锈腐蚀着铁柱。
铁锈腐蚀着铁柱。
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