The physiotherapy involved moving weights attached to a pulley.
物理疗法包括用滑轮移动重物。
What makes thellos invention work is the moving weights inside the handles. They simulate the feel of a rope moving, Clancy said.
克兰西先容说，无绳跳绳手柄中可以移动的重物会让施用者感觉是有绳索在移动。
This has prompted engineers to devise active dampers that use sensors to monitor the building’s movement and powered actuators to respond accordingly by moving weights placed on the upper floors.
这问题促使工程师们设计出利用传感器监测建筑物运动的有源阻尼器，和照着定位在上层楼面的移重而回应的动力促动器。
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