基本解释非开挖同根派生 trenchless相关词英汉例句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。trenchless更多例句