The soft soil roadbed engineering of Chuangye Avenue and Keji Avenue is disposed by high vacuum compaction method.
创业大道、科技大道软土路基工程采用高真空击密专利技术法进行处理。
With such advantages as simple production engineering, high purity production, vacuum-thermal reduction technology takes a important position in non-ferrous metallurgy field.
真空热还原制备技术具有生产工艺较简单、产品纯度高等优点，在有色金属冶金领域占有非常重要的位置。
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