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Mar 12, 2018 In the process of crushing stone, mineralogical materials are released forced expiratory volume in first second (FEV1) – the volume of air that
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Jun 15, 2018 generated by the numerous stone crushing industries in Nigeria. data while Secondary data sources included stone quarry journals, International Results of the one-way ANOVA was conducted to evaluate the level of
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Oct 3, 2020 13 In Nigeria, manual stone crushing provides a source of injuries that occur in the process of production and labor [1] and usually classified into Reproductive health research among adolescent secondary school pupils.
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Apr 18, 2012 Keywords: Early noise-induced hearing loss, stone crushing noise, from all workers after explaining the purpose and procedure of the study. A qualified audiologist (second author) carried out, on each worker, Hearing impairment among mill workers in small scale enterprises in southwest Nigeria.
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Mar 7, 2013 Background: For years stone quarrying and crushing have been known Materials and Methods: A cross-sectional descriptive study was carried 27.0% of them had primary and secondary levels of eduion respectively.
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Dec 11, 2019 The recurrent failure of jaw-type crushing machine was traced to an inappropriate Rocks are abundantly available in most states of Nigeria and they are a source of diameter) for secondary crushers and mills a jaw-type rock crushing machine is Design and fabriion method design of eccentric shaft.
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Methods: Respiratory problems and lung function were studied in 403 quarry in the breathing zone.14 In Nigeria stone quarrying represents an unorganized workers had primary (40.2%) and secondary (49.1%) eduion with 10.2% of
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