meng lin zhang ying jun (3 Ergebnisse)

paperback. Zustand: New. Language:Chinese.Pages Number: 245 Publisher: China Agricultural Science and Technology Press Pub. Date :2010-06. book on the basic characteristics of the grass. grass content and principles of evaluation. lawn evaluation of the development process. and functional assessment of environmental grass. grass-based condition assessment of grassland ecosystem service value assessment of the suitability of grassland resources production evaluation. functional assessment of primary production of gras.

paperback. Zustand: New. Paperback.Pub Date:2020-09-01 Pages:268 Publisher: Tsinghua University Press This textbook is used in the basic knowledge courses of cross-border e-commerce majors (directions). mainly based on the pre-sales. The main lines of English skills involved in sales and after-sales service include English skills related to language and text communication such as cross-border e-commerce technical terms. business appointments. business negotiations. business contracts. business letters. product sales .

paperback. Zustand: New. Paperback. Language: English Publisher: Petroleum Industry Press. Practice Zhang Hua. Lin Tiejun. Meng Yingfeng edited gas drilling basic theory and its applications describes gas drilling technology involved some basic theory and its research results. discusses the oblique mechanism of gas drilling. rock breaking mechanism. the drill string dynamics and the drill string failure mechanism and other aspects of the theory provide a theoretical basis for the realization of safe and efficient gas.