发布时间:2025-01-31 12:33:24
1/6-1/4内。为保证梁底方木安装方便,弧形梁模板弧长控制在1.2m1.5m左右为宜。,三铰拱或弧形轻型桁架,至于拱高,可在1/6-1/4内取值,南方防风,北方防雪。
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2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24 2025-01-31 12:33:24工业上为了处理含 离子的酸性废水采用以下处理方法①往工业废水中加入适量食盐②以铁作为阳极进行
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