distance multiplier
noun [ C ] physics, engineering specialized uk/ˈdɪs.təns ˌmʌl.tɪ.plaɪ.ər/ us/ˈdɪs.təns ˌmʌl.tə.plaɪ.ɚ/
距离倍增器（通过近距离的作用实现负荷远距离移动的机器或系统）
a system or machine, for example a bicycle, that uses effort over a short distance to move a load through a longer distance
Compare: force multiplier