The ship is drilling pumping sand can be made with the welfare of the hull and is located on a boat to the rotation of the crane (crane). Derrick crane device on the turntable, can rotate with the rotary disc (may also be appropriate to change).
其挖沙作业过程是起重吊杆将抓斗转动到预定的挖掘地点，将抓斗放在接近水面时，松开绞车鼓轮，让已经张开的抓斗在自重作用下，在水中垂直下落，当抓斗到达你面，斗齿破土插入泥沙中。
The process of dredging operation is derrick will grab bucket is rotated to a predetermined excavation site, grab at or near the surface of the water, release the winch drum, let already open to grab in under the action of gravity, vertically in the water drop, when the grab bucket to reach you, bucket teeth ground into the mud and sand.
此后，绞紧闭斗缆索，抓斗闭合。将抓斗起吊出水后，吊杆旋转至预定卸沙处(运输船或车辆等)。自航式抓斗挖沙船本身设有沙舱，非自航式的另配运输船。
Since then, bear close bucket cable, closed grab. The grab bucket lifting water, hanger rotates to a predetermined place (unloading sand transport ship or vehicle). Self propelled grab dredger itself with sand tank, non self propelled by another transport ship.
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