Published by Chongqing University Pub. Date :2007-01-01, 2000
ISBN 10: 7562438862 ISBN 13: 9787562438861
Seller: liu xing, Nanjing, JS, China
paperback. Condition: New. Language:Chinese.Paperback. Publisher: Chongqing University Pub. Date: 2007-01-01. The book chapters. Focuses on safe and civilized production; casting technology in some of the basics necessary; sand casting. and several commonly used modeling methods; special casting. including: metal casting. pressure casting. centrifugal casting and investment casting. This book is the migrant workers training materials can also be cast as a secondary vocational schools and professional learning materials.
Published by Meteorological Press, 2020
ISBN 10: 750297315X ISBN 13: 9787502973155
Language: Chinese
Seller: liu xing, Nanjing, JS, China
Hardcover. Condition: New. Language:Chinese.HardCover.Pub Date:2020-11-01 Publisher: Meteorological Press. Rivers. lakes and reservoirs in the hilly and mountainous areas of southern my country are important components of the regional ecosystem. The safety of water environment is of great significance to the stability of the regional ecosystem and the maintenance of ecosystem functions. Under the current situation of increasing human interference. investigate the area's water resources and water environment. and grasp .