| 摘要 |
To accomplish the aim of the invention, an underwater dredge according to one embodiment of the present invention comprises: a first sliding plate which extends in the forward and backward directions; a second sliding plate which extends in the forward and backward directions, and which is spaced apart from the first sliding plate in the direction intersecting the front and backward directions; a frame having one side coupled to the first sliding plate and the other side coupled to the second sliding plate; a plurality of rakes arranged beneath the frame and forwardly and downwardly extending from the frame; a mesh arranged at the back of the frame; a movable member arranged in front of the frame such that the movable member accesses the frame and is spaced apart from the frame within a predetermined range; and at least one tension member, one side of which is caught by the movable member and the other side of which is caught by one of the rakes and/or by the frame. |
