length of flexspline

例句：

1. 1. The engineer used a flexspline to connect the two pieces of metal together.
   工程师用一根弹性线将两块金属连接在一起。
2. 2. The flexible spline was designed to fit snugly into the hole in the gearbox.
   这种弹性套筒设计得可以紧密地插入齿轮箱的孔中。
3. 3. The flexspline was so strong that it could withstand heavy loads without breaking.
   这个弹性线非常坚固，能够承受重载而不会断裂。