国产又黄又猛又粗又爽电影的起源,性人久久,日韩三区在线观看,91精品啪在线观看国产81旧版,扒开美女狂揉视频,国产丰满天美videossex

                

 
    Resistivity Reference wafer of single crystal silicon material is made by using High purity polysilicon,throught  the single crystal equipment,and then using many manufacturing process such as doping by the way neutron evolution.Having the standards  which has certain hysical geometry size. Using Standard device which  the uncertainty is known to Calibrate the resistivity value and other parameters of Resistivity  Reference wafer.
 
    The Specification Requests of   Resistivity  Reference wafer.


 


 
    The size and the surface quality of  Resistivity  Reference wafer.