... 僭建的阳台an illegal balcony 钢筋reinforcement bars 检查部分旧楼的铝窗examine aluminium windows in some old buildings ...
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The reinforcement bars are soldered on the external sides of the columns.
吊勾焊接在立柱上或焊接在加强板上。
For other varieties of steel elements like reinforcement bars the recycling rate is a bit lower at 65%.
其他品种的钢材元素，如钢筋的再循环率相对较低为65 %。
In fact, he said, Roman structures that rely on the arch for strength can far outlast modern concrete buildings that rely on steel reinforcement bars, which eventually corrode.
实际上，他说，罗马结构依赖于高强度的拱，寿命远长于现代的依靠钢强化的混凝土建筑，而钢结构最终被腐蚀。
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