hei3 tai2 kwong3 saan3氣體擴散气体扩散
Jyutpinghei3 tai2 kwong3 saan3
Yalehei tái kwong san
Definition
gaseous diffusion
Tone guide
T1High level
T2High rising
T3Mid level
T4Low falling
T5Low rising
T6Low level
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