钢琴弦槌柄与弦槌及转击器装配之前,两端需搓压出螺纹,以达到胶粘牢固的目的。以往均由人工用锉刀搓压,效率低,质量差。营口东北钢琴厂最近试制成功弦槌柄专用搓 Piano hammer handle and hammer and swift hammer assembly before the end of the need to rub out the thread, in order to achieve the purpose of adhesive firmly. In the past by manual rasp rub, low efficiency, poor quality. Yingkou Northeast Piano Factory recently trial hammer shank dedicated rub