Cargando
EY![]()
author
E D Yardley
Dr E. D. Yardley C Eng, PhD, MIMMM, MIMechE is a retired Consultant Engineer, who has more than 30 years' experience of development, testing and practical application of equipment in the coal minin...ver másDr E. D. Yardley C Eng, PhD, MIMMM, MIMechE is a retired Consultant Engineer, who has more than 30 years' experience of development, testing and practical application of equipment in the coal mining industry.ver menos