The plane body presents a tubular shape or a flat hollow ribbon, one end of the elastic ribbon is arranged inside the plane body to be connected with the plane body, and the other end is a free end.
机身呈管状或扁平空心带状，橡筋一端设置在机身内并与机身相接，其另一端为自由端。
The plane body presents a tubular shape or a flat hollow ribbon, one end of the elastic ribbon is arranged inside the plane body to be connected with the plane body, and the other end is a free end.
机身呈管状或扁平空心带状，橡筋一端设置在机身内并与机身相接，其另一端为自由端。
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