二胡琴杆为一细长的圆形木棍,其受力长度为70厘米左右,而直径仅为1.8厘米左右,在琴弦的长期拉力作用下大多会变形。若琴杆一旦变形,即会导致琴弦对琴筒皮面的压力减弱从而影响到发音,同时由于其变形后所处于的不稳定状态,也必然会影响到定音和音准。所以,应力求避免出现这种情况。二胡琴杆在两弦拉力下必须长期稳定,纹丝不动。 Ebony Piano rod is a slender round wooden stick, its force length of about 70 cm, while the diameter of only about 1.8 centimeters, most of the string under the long-term tensile deformation. If the piano rod once deformed, it will lead to strings on the piano skin pressure is weakened thereby affecting the pronunciation, at the same time due to its deformation in the unstable state, will inevitably affect the pitch and pitch. Therefore, we should strive to avoid this situation. Ebony piano pole in the two string tension must be long-term stability, motionless.