中南大学 矿物加工 大四课程实验。调试可用！！！烧结矿TFe 55，碱度2.05.年产量 270万吨。烧结矿亚铁含量8 -failed to translate

光电耦合隔离端子 抗干扰应用与公路沥青 PWM[270] -Isolation of terminal

Quadrature Phase Shift Keying (QPSK) is a form of Phase Shift Keying in which two bits are modulated at once, selecting one of four possible carrier phase shifts (0, 90, 180, or 270 degrees).