A lined trifocal design with three areas of focus: Distance (carrier), Intermediate and Near (reading addition).
镜片设计了三个焦点领域：远距离(载体)，中距离和近距离(阅读增加)。
2
In the process of signal digital intermediate-frequency received, digital down convertion, frequency tracking of carrier and phase locked loop are the keys.
在信号的中频数字接收过程中，数字下变频、载波频率与相位跟踪是设计的关键所在。
3
The results showed that the desulfurization reaction took place at gas-solid interfaces, and that gaseous COS was found to be an intermediate product acting as sulfur-carrier.