The article analyzes that all factors effect impacting toughness of welded seam of ERW pipe on the basis of mass produce and practice.
在大量生产实践的基础上分析了影响ERW直缝电阻焊钢管焊缝冲击韧性的各种因素。
Impacting compaction is a new method to strengthen soil mass. This method has many advantages, such as high efficiency and low cost.
冲击压实是一种新型的土体处理方法，它具有效率高、综合成本低等优点，其影响深度特别符合公路、场道土基对有效加固深度的要求。
Impacting compaction is a new method to strengthen soil mass. This method has many advantages, such as high efficiency and low cost.
冲击压实是一种新型的土体处理方法，它具有效率高、综合成本低等优点，其影响深度特别符合公路、场道土基对有效加固深度的要求。
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