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back-shaft
back-shaft n. 
/ˈbakʃaft/,
Brit. /ˈbakʃɑːft/
, /ˈbakʃɑːft//ˈbakʃaft/U.S. /ˈbækˌʃæft/
part of a cotton-spinning machine./ˈbækˌʃæft/ΘΚΠ
the world > textiles and clothing > textiles > textile manufacture > manufacture of thread or yarn > [noun] > spinning > machine > parts of
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porcupine roller1776
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jack-frame1814
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sneck1825
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trumpet1877
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1879 J. Robertson in Cassell's Techn. Educator IV. 396/1 Between the roller-beam and the creels the back-shaft extends to each end of the mule.
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