phase modulation 调相†，相位调制
网络与数据通信 有线网络 释文 phase modulation, PM 相位调制
- Hydraulic Tunnel in Ancient China
- hydraulic turbine
- hydraulic valve
- hydraulic vibration oil production technique
- hydraulic winch
- hydraulis
- hydrazide
- hydrazimethylene
- hydrazimethylene; diaziridine
- hydrazine
- hydrazine fuels
- hydrazine treatment
- hydrazoate
- hydrazo compound
- hydrazoic acid
- hydrazone
- hydrazo process
- hydride
- hydride concentration in situ
- hydride formation enthalpy
- hydride generation
- hydride generationatomic absorption spectrometry
- hydride generationatomic absorption spectrometry (HG-AAS)
- hydride generationatomic fluorescence spectrometry
- hydride generationatomic fluorescence spectrometry (HG-AFS)