Disk cultivators are those in which disk blades instead of ploughs are used with which to disturb the soil already broken. 威廉·亨利·杜利特.世纪发明.
This has been evidenced by the fact that in the United States alone nearly eleven thousand patents on ploughs were issued during the nineteenth century. 威廉·亨利·杜利特.世纪发明.
They also contriv ed to temper the metal, and to make helmets, swords, lance-points, ploughs, tools, and other implements of iron. 李贝.西洋科学史.
The general features, the beam, handles, and share, have existed in ploughs from the earliest ages in history. 威廉·亨利·杜利特.世纪发明.
The inventions of centuries in ploughs have proceeded along the lines of the elements above enumerated. 威廉·亨利·杜利特.世纪发明.
There were ploughs which were made heavy or light as the different soils required, and there were a variety of farm implements, such as spades, hoes, harrows and rakes. 威廉·亨利·杜利特.世纪发明.
Ridges of faces are thrown to this side and to that, and the ploughs go steadily onward. 查尔斯·狄更斯.双城记.
A walking cultivator is when the operator walks and guides the machine with the hands as with ploughs. 威廉·亨利·杜利特.世纪发明.
Steam Ploughs: Implements for Preparing the Soil for Planting. 威廉·亨利·杜利特.世纪发明.
A man can manufacture a plough and operate it, but no amount of ploughs will create a man and endow him with skill. 沃尔特·李普曼.政治序论.
It is true that, as in the case of the ploughs, attempts had been made through the centuries to invent and improve seeding implements. 威廉·亨利·杜利特.世纪发明.
Ordinary ploughs are converted into cultivators by supplying them with double adjustable mould boards. 威廉·亨利·杜利特.世纪发明.
No ploughs and no hoes have been found. 赫伯特·乔治·威尔斯.世界史纲.
To begin with, perhaps, he just let his voice loose as one may hear Italian peasants now behind their ploughs singing songs without words. 赫伯特·乔治·威尔斯.世界史纲.
James Small of Scotland wrote of and made ploughs having a cast-iron mould board and cast and wrought iron shares in 1784-85. 威廉·亨利·杜利特.世纪发明.
Farmers refused, for instance, to use cast-iron ploughs as it was feared they would poison the soil. 威廉·亨利·杜利特.世纪发明.