普通话上声是曲折调，其后半段的调型特征为微升，台湾国语上声是低降调；
Tone 3 was flectional tone in Putonghua , and its character in second half was slight-rising , while it was low-falling in Taiwan mandarin .
变压器曲折移相调压技术的研究
Research on Zigzag Phase Shift Voltage Regulating Technique of Transformers
曲折调