Pulmonary Problems among Quarry Workers of Stone Crushing .Mar 27, 2012 . of Stone Crushing Industrial Site at Umuoghara, Ebonyi State, Nigeria. . Methods: Respiratory problems and lung function were studied in 403 quarry workers aged. 10–60 years. . required and the high level of unemploy-.functional requirements of stone crusher,functional requirements of stone crusher,Comprehensive Industry Document Stone Crushers - CPCB ENVISThe Comprehensive Industry Document on Stone Crushers is latest among .. in producing crushed stone of various sizes depending upon the requirement .. function of the size distribution of the material, and the amount of mechanically.
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