网络与数据通信 有线网络 释文 quadrature amplitude modulation, QAM 正交振幅调制
- purgative，cathartic
- Purgatory
- purgatory
- purge and trap
- purge and trap (PAT)
- purge stack
- purging
- purging technique
- purification
- purification and rejuvenation of grass varieties
- purification by manipulating the mouse embryo
- purification by vacuum vaporization
- purification coefficient
- purification factor
- purification for fraction
- purification impurity of tungsten concentrate
- purification machine
- purification of bioleaching solution
- purification of coarse sodium tungstate solution
- purification of colloid
- purification of crude titanium tetrachloride
- purification of organic waste gas by catalytic combustion
- purification of water supply
- Purification rite
- purification tank technique for treatment of domestic sewage