Bushing

n. (Mechanics, Electronics) insulated device that enables an electrical conductor to pass in a safe manner through an earthed conducting barrier; metal insert used to reduce friction; bearing for a revolving shaft

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Noun
1. an insulating liner in an opening through which conductors pass
(hypernym) insulator, dielectric, nonconductor
(derivation) bush
2. a cylindrical metal lining used to reduce friction
(synonym) cylindrical lining
(hypernym) lining
(derivation) bush

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Noun
1. a low woody perennial plant usually having several major branches
(synonym) shrub
(hypernym) woody plant, ligneous plant
(hyponym) Catha edulis
(member-holonym) shrubbery
2. a large wilderness area
(hypernym) wilderness, wild
(hyponym) outback
3. dense vegetation consisting of stunted trees or bushes
(synonym) scrub, chaparral
(hypernym) vegetation, flora
4. hair growing in the pubic area
(synonym) pubic hair, crotch hair
(hypernym) hair
(hyponym) minge
(part-holonym) adult body

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Verb
1. provide with a bushing
(hypernym) supply, provide, render, furnish
(derivation) bushing

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Adjective
1. not of the highest quality or sophistication
(synonym) bush-league
(similar) inferior

(p. pr. & vb. n.)
of Bush
  

(n.)
The operation of fitting bushes, or linings, into holes or places where wear is to be received, or friction diminished, as pivot holes, etc.
  

(n.)
A bush or lining; -- sometimes called a thimble. See 4th Bush.
  

کِلی بوشینگ ، بوش رانش کِلی ، بوش یا وسیله ای که به روتاری تیبل متصل شده و کِلی از میان آن عبور می نماید و باعث انتقال چرخش به رشته حفاری می گردد