A new experimental scheme of measuring lens focal length has been put forward on the basis of the improved laser plate shearing interference method.
本文在改进的激光平板剪切干涉法基础上，提出了测量透镜焦距的一种新的实验方案。
2
Furthermore, the relation of fabric drapability and stretching-length, flexual modulus and shearing modulus is also discussed.
初步研究了织物伸出长度、弯曲刚度、剪切刚度对静态悬垂系数的影响。
3
SILMEN full-speed shearer is an important device for fixed-scale steel tape shearing. Its running speed is highly related to the length and thickness of the steel tape.