是利用微开挖或不开挖技术对地下管线、管道和地下电缆进行铺设、修复或更换的一门科学，也包含地下管线的探测、检查和地下管线资产管理等方面的内容。Trenchless Technology is the science of installing, repairing or renewing underground pipes, ducts and cables using techniques which minimize or eliminate the need for excavation, sometimes also called "No-Dig"
