三、琴筒的制作[续] (四)胶琴筒琴筒的构造如图3—6所示。胶琴筒前先要选板:要求六块板树种相同,材色一致或接近一致;若有黄褐色和深红色相间花纹者,六块板则都需有类似花纹。其次是木纹顺直,无节疤,结构致密并有较高的弹性。外观选择后,再把六块板依次相 Third, the production of the piano tube [continued] (D) The structure of the rubber piano cylinder as shown in Figure 3-6. Before the plastic tube cylinder palette: the requirements of the same six tree species, the same color or close to the same material; if the pattern of brown and dark red and white, six plates are required to have similar patterns. Followed by wood straight, no knuckles, compact structure and high flexibility. After the appearance of choice, then the six plates followed by phase