An increase in resistance to roll deflections may be gained by splitting the single strut into a fork at the top . 采用上部分呈叉状的单支杆可以增强抗滚转变形性能。
Bell spent his evening experimenting with tuning forks ( forkshaped pieces of metal which always produce the same musical note and which are used to tune pianos ) , metal springs , and magneto batteries 贝尔整晚用调音叉(叉状的金属条,它可以产生相同的音符,并且可以用来调钢琴、金属线、磁电池进行试验。