👉 In mechanics, a lever is a mechanical device that is used to transfer force from one object or system to another. Levers are commonly found in household appliances such as a kitchen knife, bicycle handlebars, and hand起重设备。
👉 In mechanics, a lever is a mechanical device that is used to transfer force from one object or system to another. Levers are commonly found in household appliances such as a kitchen knife, bicycle handlebars, and hand起重设备。
