trenchless installation

• 非开挖

trenchless installation的用法和样例：

例句

1. Installing and rehabilitating pipes and cables beneath the streets by trenchless techniques require novel techniques and much planning and liaison with the local authorities.
   在街道下通过非开挖技术进行建设和修复管道及电缆需要新的技术，周密的计划以及与当局的沟通。