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详细介绍了国外非开挖设备气动锤、夯管锤、实现旧管更新的碎管机、可导向的定向钻机、顶管机等设备的技术性能和特点。在此基础上提出引进国外设备时需要注意的问题
The technical performance and characteristics of foreign trenching equipment such as pneumatic hammers, rammer hammers, broken pipe machines for renewing old pipes, directional directional drills and pipe jacking machines are introduced in detail. On this basis, we put forward the problems that need attention when importing foreign equipment