ISBN: 9787502938192 - 特种作业/凿岩工 国家经贸委 著作 (1 resultados)

paperback. Condición: New. Language:Chinese.Publisher: weather Pub. Date: 2010 - 02-24. The book outlines the relevant state departments of existing assessment. standards-based. existing as a reference material throughout. extensive training. review work to absorb the experience. security the main line and the combined review of the characteristics of work. focusing on describes the drilling work must master new technologies. new processes. new equipment and other safety-related knowledge. Include a variety of rock dri.…