rotary drain cutter
旋转式排水沟挖掘机
They are digging trenches to drain the water away.
他们正在掘沟排水。
ditch the land to drain it.
在陆地上挖沟渠来排水。
We must dig a trench to drain away the water.
我们必须挖一条沟排水。
To make(a tunnel) by digging.
挖出通过挖掘而挖成（沟）
airwater pipeline trenching sled
气水喷射式管沟挖掘滑橇
They dug channels to bring in water from the Grand Canal to irrigate the rice fields.
他们挖掘沟渠从大运河引水灌溉稻田。
sewerage dredger
(敷设污水管用的)挖沟机
It would obviously be impractical to require a federal permit every time a farmer digs a ditch that connects to an existing drainage system.
农夫每次挖掘通连一个固定排水系统的水沟都要受联邦限制，这显然是不符合实际的。
a laborer who digs ditches.
挖掘沟渠壕沟的劳工。
He made ditches in the fields to draw off the water.
他在田里挖了沟以便排水。
labor of a nonmilitary kind done by soldiers (cleaning or digging or draining or so on).
士兵做的清洗、挖掘、排水等的体力劳动。
A drainage passage, as to a culvert.
排水沟排水通道，如阴沟
Alongside each irrigation canal a drainage ditch was dug.
沿着每一条灌溉渠，他们还挖了一条排水沟。
Emission Control Technologies for D6D Diesel Engine of Excavator
挖掘机用D6D型柴油机排气控制技术分析
remove with a dredge, usually from a bottom of a body of water.
常指用挖掘机从带水的物体的底部挖泥。
CFD Simulation of Exhaust Muffler with Complicated Structures for an Excavator
挖掘机用复杂结构排气消声器的CFD仿真研究
A barge or boat equipped with a dredge.
挖泥船装有挖掘机的船