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

Detection&Calibration >> Reference Material >> Minority carrier lifetime Reference Wafer
                

 

    Lifetime Reference Wafer is used to correct the parameters which is used to test the value of Lifetime,and than make it can accurate measure the value of lifetime.

 

    Because the lifetime of surface can decay with time growth,so every Lifetime Reference Wafer has its validity,we must re-Verificate them on time, the Cycle is commonly 5 months.

 

 

?2008-2050 HenergySolar. All rights reserved