Having properties of both a solid and a liquid, liquid crystal consists of rod-shaped bipolar molecules which are capable of twisting polarized light when in the "off" state.
有固体和一种液体的特性，液晶由杆形成的双极的分子组成当在关态里时，能缠绕偏振光。
2
The invention does not need molds, can realize the purpose of twisting and processing rod pieces of different lengths at any angle, and has the advantage of quick and convenient processing.
优点是不需要模具，可实现任意角度、不同长度杆件的扭转加工，且加工快捷方便。
3
On the basis of the analysis of the twisting vibration of rotary sucher-rod string, a formula of calculating every harmonic vibration eigenfrequency is presented.