gung1 cing4 tou4 hok6工程圖學工程图学
Jyutpinggung1 cing4 tou4 hok6
Yalegūng chìngh tòuh hokh
Definition
engineering graphics
Tone guide
T1High level
T2High rising
T3Mid level
T4Low falling
T5Low rising
T6Low level
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