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单词 crushing
释义

crushing


crush

C0778100 (krŭsh)v. crushed, crush·ing, crush·es v.tr.1. a. To press between opposing bodies so as to break, compress, or injure: The falling rock crushed the car.b. To break, pound, or grind (stone or ore, for example) into small fragments or powder.2. a. To put down with force; subdue: The regime crushed the rebellion.b. To overwhelm or oppress severely: spirits that had been crushed by rejection and failure.c. To defeat overwhelmingly: Our team was crushed in the playoffs.3. To crumple or rumple: crushed the freshly ironed shirt.4. To hug, especially with great force.5. To hit or propel with great force: a swing of the bat that crushed a fastball over the wall.6. To press upon, shove, or crowd.7. To extract or obtain by pressing or squeezing: crush juice from a grape.v.intr.1. To be or become crushed: Aluminum cans crush easily.2. To proceed or move by crowding or pressing: The fans crushed forward to get a glimpse of the movie star.n.1. The act of crushing or the pressure involved in crushing: matter superheated by the crush of gravity around black holes. 2. A great crowd: a crush of spectators.3. A substance prepared by or as if by crushing, especially a fruit drink: orange crush.4. Informal a. A usually temporary infatuation: had a crush on her friend's cousin.b. One who is the object of such an infatuation.Phrasal Verb: crush on Slang To be infatuated with (someone).
[Middle English crushen, from Old French croissir, of Germanic origin.]
crush′a·ble adj.crush′er n.crush′proof′ (-pro͞of′) adj.Synonyms: crush, mash, smash, squash2
These verbs mean to press forcefully so as to reduce to a pulpy mass: crushed the rose geranium leaves; mashed the sweet potatoes; smashed the bamboo stems with a hammer; squashed the wine grapes. See Also Synonyms at crowd1.

crushing

(ˈkrʌʃɪŋ) adj1. devastating; overwhelming: a crushing defeat. 2. extremely heavy: a crushing burden of debt. ndefeat; repression; putting down
Thesaurus
Noun1.crushing - forceful preventioncrushing - forceful prevention; putting down by power or authority; "the suppression of heresy"; "the quelling of the rebellion"; "the stifling of all dissent"quelling, stifling, suppressionprevention, bar - the act of preventing; "there was no bar against leaving"; "money was allocated to study the cause and prevention of influenza"crackdown - severely repressive actions
Adj.1.crushing - physically or spiritually devastating; often used in combination; "a crushing blow"; "a crushing rejection"; "bone-crushing"devastatingdestructive - causing destruction or much damage; "a policy that is destructive to the economy"; "destructive criticism"
Translations
压倒性的

crush

(kraʃ) verb1. to squash by squeezing together etc. The car was crushed between the two trucks. 壓碎 压碎2. to crease. That material crushes easily. 弄皺 弄皱3. to defeat. He crushed the rebellion. 打敗 打败4. to push, press etc together. We (were) all crushed into the tiny room. 塞到,擠到 挤进,挤入 noun squeezing or crowding together. There's always a crush in the supermarket on Saturdays. 擁擠的人群 拥挤的人群ˈcrushing adjective overwhelming. a crushing defeat. 壓倒性的 压倒性的

Crushing


crushing

[′krəsh·iŋ] (mining engineering) The quantity of ore pulverized or crushed at a single operation in processing.

Crushing

 

in engineering, the process of breaking pieces of hard material to reduce their size. The pieces are broken by external forces that overcome the forces of cohesion among the particles of the material. Crushing does not differ in principle from grinding, but it is arbitrarily considered that crushing yields products larger than 5 mm and grinding yields products smaller than 5 mm. Crushing can be accomplished by pressure, splitting, abrasion, or striking. Firm and abrasive materials are crushed mostly by pressure; firm and viscous materials, by pressure combined with abrasion; soft and brittle materials, by splitting and striking.

The work in crushing is expended on the deformation of the piece of material and the formation of a new surface of small pieces. A large part of the energy expended is dispersed in the form of heat, and only a small part is converted into the free surface energy of the solid. The total work of crushing is equal to the sum of the work of deformation and the formation of new surfaces. This general formula was put forth by P. A. Rebinder in 1944. For approximate calculations it is assumed that the work required to crush a piece of size D at a given degree of crushing is directly proportional to D2.5.

Crushing is described by the degree of crushing—that is, by the ratio of sizes of the largest pieces of material before and after crushing. Another index is the unit expenditure of energy—the kilowatt-hours (kW-hr) per ton of crushed material. Crushing is usually combined with screening.

A distinction is made between open and closed crushing cycles. In the first case the product, which has already been sized, is screened off before entering the crusher and is recovered after crushing; in the second case, the material is screened after crushing into small pieces (the finished product) and large pieces, and the large pieces are run through the same crusher again. Several steps (stages) are used in sequence in order to produce a high degree of crushing. In ore enrichment, two, three, or four stages of crushing are used, and the unit expenditure of energy to crush pieces of material 900-1,200 mm in size into pieces 25 mm in size is 1.5-3.0 kW-hr per ton of ore.

Hand crushing and firecrushing were known 3,000 years before the Common Era. The simplest devices—falling pestles driven by a waterwheel—were used as early as the Middle Ages and were described by G. Agricola. Machine crushing began to develop in the early 19th century.

Hydroexplosive, thermal, electrothermal, and other means of crushing have been under study since the 1950’s in the USSR and other countries; however, the mechanical processes described above will be the main ones used in the next several decades.

Crushing is used in the mining, metallurgical, chemical, and food industries, in construction, and in agriculture.

REFERENCES

Levenson, L. B., and G. M. Kliuchev. Proizvodstvo shchebnia. Moscow, 1959.
Andreev, S. E., V. V. Zverevich, and V. A. Perov. Droblenie, izmel’chenie i grokhochenie poleznykh iskopaemykh, 2nd ed. Moscow, 1966.
Trudy Evropeiskogo soveshchaniia po izmel’cheniiu. Moscow, 1966. (Translated from German.)
Arsh, E. I., G. K. Vitort, and F. B. Cherkasskii. Novye metody drobleniia krepkikh gornykh porod. Kiev, 1966.
Ponomarev, I. V. Droblenie i grokhochenie uglei. Moscow, 1970.

V. A. PEROV

FinancialSeecrush

crushing


  • all
  • noun
  • adj

Synonyms for crushing

noun forceful prevention

Synonyms

  • quelling
  • stifling
  • suppression

Related Words

  • prevention
  • bar
  • crackdown

adj physically or spiritually devastating

Synonyms

  • devastating

Related Words

  • destructive
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