DDS technique is applied in this paper to design and carry out the piezoelectric crystal admittance circle measurement machine.
采用DDS技术设计并实现了压电晶体导纳圆测量仪。
The crystal structures of bastnaesite-(Ce) and fluocerite-(Ce) was refined by high power four-circle X-ray diffractometer.
用强功率四圆单晶衍射仪精确地修正了氟碳铈矿和氟铈矿的晶体结构。
The crystal structure was determined with four-circle diffractometer.
用四圆衍射仪测定了晶体结构。
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