These consist of a series of small ferrite cores of maximum diameter 2 mm.这些由一系列最大直径为2毫米的小铁氧体磁心组成.The citrate sol - gel synthesis method has been used to prepare zinc ferrite.采用硝酸铁、硝酸锌、柠檬酸制备前驱体,在不同加热温度与速率下制备锌铁氧体.The effe...
These high yields have been achieved largely through better methods of cultivation.这样高的产量主要是通过改良耕作方法取得的.With member - country bond yields now diverging,'it's a fragmented set of markets.但随着成员国债券收益率之差扩大, 市场已经分割开...