These provided an important theoretical base for lengthening the life of the impeller and the control cage.
这为进一步提高分丸轮、定向套等抛丸器易损件的寿命提供了重要的理论依据。
These provided an important theoretical base for lengthening the life of the impeller and th...
这为进一步提高分丸轮、定向套等抛丸器易损件的寿命提供了重要的理论依据。
Dongkeng town provided with favorable farming conditions due to wide and flat topography is an important sunflower oil base in our county .
靖边县东坑镇地势广阔平坦，耕作条件优越，是我县主要的油葵生产基地。
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