The utility model has the advantages of simple structure, easy fabrication, and favorable exhaust and suction circulation for air in soles.
本实用新型结构简单，制造容易，鞋底空气的排吸循环良好。
The utility model is simple in structure and easy in assembly, and with low risk of braking failure and low fabrication cost.
本实用新型结构简单， 安装难度小，制动失效机率较低，制造成本低。
This device is a new type of intelligent instrument developed first in our country, with the feature of speaking clear- ly and naturally, stable function, simple fabrication, easy test and adjustment.
它性能稳定，发音清晰自然，制作调试简便，是国内首先开发的智能型仪器的一代新产品。
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