top down construction method
top down construction method
自顶向下施工法
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Combining with some reconstruction engineering, construction technology of half top-down method for swirl sedimentation tank of rolling plant is introduced.
结合某改造工程，介绍了轧钢厂旋流沉淀池池壁筒体半逆作法施工技术。
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