zhao feng qing zhang yuan (3 risultati)

paperback. Condizione: New. Language:Chinese.Pub Date: 2014-07-01 Pages: 163 Publisher: China Agricultural Science and Technology Publishing House Science pig practical new technology is a new technology professional farmer training materials. Textbook is divided into seven chapters. including the standardization of modern animal husbandry and livestock breeding. pig economic types and varieties. feeding and management overview pigs. pig feeding and management. hog production. diagnosis and prevention of common diseases.

paperback. Condizione: New. Language:Chinese.Paperback. Pub Date: 2024-07 Pages: 248 Publisher: China Architecture & Building Press As an outstanding representative of the architectural art of the Ming and Qing dynasties in my country. the Xi'an Bell Tower carries rich historical and cultural information and outstanding ancient architectural construction skills. It is not only a city landmark in Xi'an. Shaanxi Province. but also an important part of the cultural heritage of the Chinese nation. Its protection and researc.

paperback. Condizione: New. Paperback. Pub Date: 2021-08-01 Pages: 396 Language: Chinese Publisher: China Electric Power Press must do a good job in the energy-saving work of coal-fired units. and must accurately count the energy efficiency level of each unit. and the overall energy efficiency of the unit Carry out accurate evaluation. in-depth diagnosis. and then perform performance optimization adjustment work and technical improvement work. so that good energy-saving effects can be received.?In order to help the majo.