A replacement can be used for teaching and playing the dual system of accordion, a side between the left and right resonating boxes and bellows edges with one or more removable tenon structure to connect, and another side edge is relative with one or more locked connecting structure connected, locking connection structure using spring, spring, bending angle, hasp, strip, slider and other components in various structures. The invention only needs to replace the corresponding common sounding box, and the utility model can be used for fixing four chords of a chord group, a free bass, a keyboard type accordion, or a monkey. The utility model has the advantages of simple structure, and is suitable for young children to play the piano.
【技术实现步骤摘要】
【国外来华专利技术】
【技术保护点】
一种用于羽毛球的人造羽毛,包括一个羽轴(1)和羽片(2、3),羽片部分(2、3)由一种塑性材料制成,它们和羽轴(1)形成一个整体,并从羽轴(1)处向相反的方向伸出,这种人造羽毛的特征在于,在羽轴(1)的全部长度上,其横截面至少具有一个抗热变形能力较高的纤维加强部分(4、7、8),而羽轴(1)横截面的剩余部分(5、6)由一种塑性材料制成,这种塑性材料通过在一个基本上不会使纤维加强部分受到热变形作用的温度下热变形,能够与羽片部分(2、3)的塑料不可分离地连接在一起。
【技术特征摘要】
【国外来华专利技术】
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