Because of the inefficiency of the solar energy it needs more collectorarea and more place for the system.
但是由于太阳能热效率低，系统需要庞大的集热器面积和占地面积，对用户建筑要求较高。
2
A buried layer (7) is provided as a collector connection area which joins the collector contact (6) to a collectorarea (14).
埋层(7)作为集电极连接区域提供，用于连接集电极接触(6)和集电极区(14)。
3
Regardless of type NPN or PNP-type tubes, the internal transistor has three areas, namely, the launch area, base, collectorarea, the three areas form two PN junction.