Hydraulic back-hoe dredger is a new type of dredger developed and specially for handling hard soil and stone.
液压反铲挖掘船是近几年国际上新出现的一种新型挖掘作业船，专门挖掘硬质土和石块。
The study provides the meaningful reference for anti-seismic safety design for railway simply supported bridge on hard-soil foundation.
笔者的研究成果为硬土质基础的铁路简支梁桥的抗震安全设计，提供了重要参考。
The study provides the meaningful reference for anti-seismic safety design for railway simply supported bridge on hard-soil foundation.
笔者的研究成果为硬土质基础的铁路简支梁桥的抗震安全设计，提供了重要参考。
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