Back of the breakwater the dredger was working.

在防波堤后面挖泥船正在工作。

They riprapped the breakwater with stone.

乱石基巩固防波堤。

The project department monitors and controls the whole process of breakwater enrockment costruction by field observing instruments buried in sand soft nappe.

通过埋设在砂肋软体排上的原形观测器,对防波堤抛石施工过程进行了全程监测。