Trenchless technology is a practical new technology that the advanced science and technology is combined with social demand.
非开挖技术是先进的科学技术与社会需求相结合的实用型新技术。
参考来源 - 非开挖导向钻进铺管技术的理论研究与计算机应用pneumatic impact haxrmner, mathematics model, computer imitation, optimum design, trenchless technology
气动冲击锤,数学模型,计算机仿真,优化设计,非开挖。
参考来源 - 气动冲击锤的计算机模拟研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Trenchless construction faces significant risks as underground uncertainty, especially in a congested city.
由于地下的不确定性，特别是在拥挤的城市，非开挖施工常面临极大的风险。
Trenchless construction faces significant risks due to uncertainty underground, especially in a congested city.
由于地下的不确定性，特别是在拥挤的城市，非开挖施工常面临极大的风险。
This paper describes the construction, utilization, advantage and disadvantage of three kinds of trenchless techniques of lay polyethylene pipe.
论述了三种不挖沟敷设聚乙烯管技术的施工、应用和优缺点。
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