调音时，吉他手旋紧琴桥上的调整螺旋来修正所对应弹簧的位置，以此改变杠杆角度获得正确的张力。
To tune up, the guitarist tightens an adjustor screw at the bridge that alters the position of its corresponding spring, changing its leverage to obtain the right tension.
表的每一部分都是由他亲手制作，没有使用任何外来的零件——螺钉、弹簧、杠杆、托盘和齿轮、指针以及简洁但是有无数刻度的钟面。
He made the screws, the springs and the levers, the pallets and gears, the hands and the plain, often numberless dials.
每根琴弦附在每一杠杆上，各杠杆依次连接每一根弹簧。
Each string is attached to a lever, which is in turn attached to a spring.
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