society > occupation and work > equipment > earth-moving and excavating equipment > [noun] > dredging equipment
dredge1471
clam-shell1508
drag1611
steam dredge1801
dredging-machine1830
hedgehog1838
bag and spoon1840
hydrophore1842
dredger1863
gold dredge1881
gold dredger1897
suction dredge1901
bucket dredge1907
cutter-dredge1913
1913 B. F. Thomas & D. A. WattImprovem. Rivers (ed. 2) i. 100 The cutter dredge,..in which the material is loosened by a series of knives shaped so that they will not clog, fastened to a shaft and revolving close to the end of the suction pipe.