Using The Lever Principle 利用杠杆原理
He thinks that Chopstick used the principle of lever and what hands can do.
他认为，筷子使用的原则，杠杆和手可以做什么。
A single sensor liquid adding system (SSLAS) was developed and it worked based on the metering principle and weighed by a sensor and lever system.
设计的单传感器液体秤基于重量式计量原理，采用单传感器结构，借助杠杆系统进行称重。
A nanometer system for displacement measurement is described, which is based on the principle of optical lever.
介绍了一种基于光杠杆原理的光学微位移测量系统。
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