drag head造句

The control of mixture of water and sand is done by a so-called dredge drag head visor.
To cut the sea bed, the dredge drag head is equipped with replaceable teeth and water jet nozzles.
In order to dredge in waves, the suction pipe is suspended from special davits, which operate with heave compensation to ensure that the drag head nozzles stay in contact with the sea bed.
The nozzles are placed at the front of the dredge drag head and used to cut the sand at the sea bed vertically, while the replaceable teeth are placed at the back to cut horizontally.
It's difficult to find drag head in a sentence. 用drag head造句挺难的