它除了有现有的单簧两端连接把手的臂力器的使用功能外，也能做屈肘、收胸的运动。
The four-spring rectangle chest-expander has the function of the existing chest-expander with single spring ends connecting handles, and besides, has the functions of bending elbows and drawing chest.
从前面观看，四肢行走时并不在一个平行的平面上，而是稍微内收，以弥补腿短与宽胸的缺陷。
Viewed from the front, legs do not move in exact parallel planes, but incline slightly inward to compensate for shortness of leg and width of chest.
从前面观看，四肢行走时并不在一个平行的平面上，而是稍微内收，以弥补腿短与宽胸的缺陷。
Viewed from the front, legs do not move in exact parallel planes, but incline slightly inward to compensate for shortness of leg and width of chest.
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