simultaneous tone sequential system同时单音顺序制
tone multifrequency system双音多频制
four tone telegraph system四音电报系统;翻译
tone ranging system侧音测距系统
individual tone sequential system顺序单音制
five tone sequential system五音顺序制
two tone telegraph system二音电报制;双音电报制
dynamic tone-system动态律制
It discoversby experiments that the first part of yangpingand rushing havethe feature of concavity, the tone system of Changsha dialecthas perfect symmetry and the difference in tones of Changshais obvious.
实验发现：阳平调和入声调的前段都有凹型特征；长沙话声调系统有整齐的对称格局；各声调之间区别度大。
参考来源 - 湘语声调实验研究