This had originally consisted of two levers, placed side by side. 鲁伯特·萨金特·荷兰.历史性发明.
To stop the locomotive, the armature circuit was opened by the main switch, stopping the flow of current, and then brakes were applied by long levers. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Among these, are siphon pumps, the force pump of Ctesibius, a fire-pump, having two cylinders, and two pistons, valves, and levers. 威廉·亨利·杜利特.世纪发明.
I lay at full length along the deck with the levers and buttons of control before me. 埃德加·赖斯·巴勒斯.火星战神.
Thus some very high wheels, with a small wheel in front, or one behind, wheels with levers in addition to the crank, etc. 威廉·亨利·杜利特.世纪发明.
The first organized typewriter in which separate key levers were provided for each type is a French invention. Edward W. Byrn.十九世纪发明进展.
The circular index plate _n_ had marked on it opposite the respective levers the letters and characters represented by said levers. Edward W. Byrn.十九世纪发明进展.
You are the levers of the Circumlocution Office, and the rulers of men. 查尔斯·狄更斯.小杜丽.
He grasped the levers, spoke a few words of instruction to his passenger, seated beside him, and gave the word to release the machine. 鲁伯特·萨金特·荷兰.历史性发明.
It was the clank of the levers and the swish of the leaking cylinder. 阿瑟·柯南·道尔.福尔摩斯历险记.
One of the most useful levers of this type is the wheelbarrow (Fig. 99). 伯莎M.克拉克.科学通论.
The outer rolls _d e_ are pressed against the inner ones _a c_ by a system of weighted levers, and scrapers below remove the crushed grain from the periphery of the rolls. Edward W. Byrn.十九世纪发明进展.
The paper is held stationary, and the whole nest of levers was moved over the paper for each letter printed. Edward W. Byrn.十九世纪发明进展.
It had a series of finger keys connected with printing levers which were arranged in a circle, and struck at a common center. Edward W. Byrn.十九世纪发明进展.
In the second century before Christ, the Egyptians had pumps worked by levers to put out their fires. 佚名.神奇的知识之书.
The first American improvement was invented by George Clymer, of Philadelphia, in 1817, the power being an improved lever consisting of three simple levers of the second order. 威廉·亨利·杜利特.世纪发明.
He lay a little forward of where I stood at the levers, and thus he faced the stern of the vessel as he addressed me. 埃德加·赖斯·巴勒斯.火星战神.
In 1798 the Earl of Stanhope had a cast-iron frame made to replace the wooden one and added levers to give more power to the pressman. 佚名.神奇的知识之书.
I implored the colonel to let me out, but the remorseless clanking of the levers drowned my cries. 阿瑟·柯南·道尔.福尔摩斯历险记.
Upright key levers _s_ are arranged in a circle around a circular plate _n_. Edward W. Byrn.十九世纪发明进展.
Hammers (Fig. 102), tack-lifters, scissors, forceps, are important levers, and if you will notice how many different levers (fig. 伯莎M.克拉克.科学通论.
So they attached levers, pulleys, ratchets and windlasses, until at last they reached the size of the great siege cross-bows, weighing eighteen pounds. 佚名.神奇的知识之书.
In the latter the whole carriage and system of type levers move over the book. Edward W. Byrn.十九世纪发明进展.
The printing levers were arranged in a circle in pairs, one riding on the top of the other. Edward W. Byrn.十九世纪发明进展.
The hammers A are constructed as elbow levers. Edward W. Byrn.十九世纪发明进展.
When the operator pressed a key, the two printing levers of each pair answering to the letter key were brought together, the paper being between them. Edward W. Byrn.十九世纪发明进展.
He apparently had given no conscious thought either to his hands or to the levers. 鲁伯特·萨金特·荷兰.历史性发明.
He became thoroughly familiar with the intricacies of fire-box, boiler, valves, levers, and gears, and liked nothing better than to handle the locomotive himself during the run. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.