单词：trenchless
trenchless的用法和样例：
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。
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