ISBN: 9787502121280 - the oil workers' technical level training materials: oil analysis tools(chinese edition) (1 Ergebnisse)

paperback. Zustand: New. Paperback Pages Number: 235 Language: Chinese. In order to improve the quality of the oil workers. to meet the needs of the oil workers' training and assessment. prepared by the China National Petroleum Corporation. the Labour Bureau of the training materials of a set of technical level of workers. Set of teaching materials according to the state issued the workers' standard of technical grade and the Corporation Labour Office organized the oil workers the skills project. according to the typ.…