Sixty great dredges were employed on the work, and the dredged material was discharged in chutes on to the bank. Edward W. Byrn.十九世纪发明进展.
This battery soon drove out our dredges, two in number, which were doing the work of thousands of men. 尤利西斯·格兰特.U．S．格兰特的个人回忆录.
Dredges were put to work immediately widening the channel at Cucaracha slide in Gaillard Cut, so that within a short time the canal was ready for use throughout its entire length. 佚名.神奇的知识之书.
The depth of water at which the Bucket Ladder dredges is regulated by the Hoisting Shears and Chain Barrel D D, driven by shafting E E from the Engines. 佚名.神奇的知识之书.
There are several forms of mechanical, power-operated dredges. 佚名.神奇的知识之书.
With the construction of canals and harbors, great improvements have been made in dredges. Edward W. Byrn.十九世纪发明进展.