Pulley
['pʊlɪ] or ['pʊli]
解釋/意思:
(noun.) a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope.
伊米莉亚整理--From WordNet
解釋/意思:
(v. t.) A wheel with a broad rim, or grooved rim, for transmitting power from, or imparting power to, the different parts of machinery, or for changing the direction of motion, by means of a belt, cord, rope, or chain.
(b. t.) To raise or lift by means of a pulley.
手打:旺达
解釋/意思:
n. a wheel turning about an axis and having a groove on its rim in which a cord runs used for raising weights:—pl. Pull′eys.—ns. Pull′ey-block a shell containing one or more sheaves the whole forming a pulley; Pull′ey-shell the casing of a pulley-block.
格思里整理
例句/造句/用法:
- The opening for putting in the ice, shown just under the pulley in the cut, has two doors with a space between; each door a foot thick. 威廉K.大衛. 智者、化學家和偉大醫生的秘密.
- The lever and the pulley, lathe s, picks, saws, hammers, bronze operating-lances, sundials, water-clocks, the gnomon (a vertical pillar for determining the sun's altitude) were in use. 李貝. 西洋科學史.
- Such a pulley is known as a fixed pulley. 伯莎M.克拉克. 科學通論.
- The animals are driven into a catching pen at 1, where they are strung up by one leg, and secured to a traveling pulley on an overhead rail. Edward W. Byrn. 十九世紀發明進展.
- A vertical shaft D is rotated constantly by a band on pulley _d_. Edward W. Byrn. 十九世紀發明進展.
- By means of a pulley, a force in one direction produces motion in the opposite direction. 伯莎M.克拉克. 科學通論.
- If we employ a stationary pulley, as in Figure 109, we do not change the force, because the force required to balance the load is as large as the load itself. 伯莎M.克拉克. 科學通論.
- The revolving disk-shaped cutter E is rotated by a pulley and belt from a drum, which latter is made long enough to accommodate the travel of the frame. Edward W. Byrn. 十九世紀發明進展.
- No surface can be made perfectly smooth, and when a barrel rolls over an incline, or a rope passes over a pulley, or a cogwheel turns its neighbor, there is rubbing and slipping and sliding. 伯莎M.克拉克. 科學通論.
- A pulley and belt, connected to a circular saw larger than the motor, permitted large logs of oak timber to be sawed with ease with the use of two small cells of battery. 弗蘭克·路易斯·戴爾. 愛迪生的生平和發明.
- The steam engine of this truly ingenious contrivance, together with the boiler and the driving pulley, weighed only sixteen ounces. 佚名. 神奇的知識之書.
- The weight is divided equally between the two parts of the string which passes around the pulley, so that each strand bears only one half of the burden. 伯莎M.克拉克. 科學通論.
- The bed is run in and out by turning a crank on a shaft which has a pulley and belt passing around it. Edward W. Byrn. 十九世紀發明進展.
- A small electrical motor 1, run by a storage battery or electric light wires, turns a belt 3, and rotates pulley 4 and a long horizontal cylinder 5 running beneath the keyboard. Edward W. Byrn. 十九世紀發明進展.
- It is sometimes more convenient to move a load in one direction rather than in another, and the pulley in its simplest form enables us to do this. 伯莎M.克拉克. 科學通論.
- Instead of the rope and pulleys Newcomen fastened a walking-beam to the end of the piston, and attached a pump-rod to the other end of the walking-beam. 魯伯特·薩金特·荷蘭. 歷史性發明.
- A combination of pulleys called block and tackle is used where very heavy loads are to be moved. 伯莎M.克拉克. 科學通論.
- This seems most marvelous until we learn that the lines are pulled back and forth by pulleys at the window and at a distant support. 伯莎M.克拉克. 科學通論.
- This was an endless steel belt serrated on one edge, mounted on pulleys, and driven continuously by the power of steam through the hardest and the heaviest work. 威廉·亨利·杜利特. 世紀發明.
- Sometimes we received wine and victuals from below, which were drawn up by pulleys. 喬納森·斯威夫特. 格列佛遊記.
- An effective arrangement of pulleys known as block and tackle. 伯莎M.克拉克. 科學通論.
- In Figure 111 the upper block of pulleys is fixed, the lower block is movable, and one continuous rope passes around the various pulleys. 伯莎M.克拉克. 科學通論.
- He fastened the upper end of the piston to a rope, which passed over two pulleys. 魯伯特·薩金特·荷蘭. 歷史性發明.
- At R and R′ are two pulleys connected by gut. 威廉K.大衛. 智者、化學家和偉大醫生的秘密.
- By means of pulleys, awnings are raised and lowered, and the use of pulleys by furniture movers, etc. 伯莎M.克拉克. 科學通論.
- 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. 神奇的知識之書.
- After some consideration of the gearing question, it was decided to employ belts instead of the friction-pulleys. 弗蘭克·路易斯·戴爾. 愛迪生的生平和發明.
- In our childhood many of us saw with wonder the appearance and disappearance of flags flying at the tops of high masts, but observation soon taught us that the flags were raised by pulleys. 伯莎M.克拉克. 科學通論.
手打:纳塔利