On this basis, the simplified tri linear analytical method to determine bi directional shearing capacity is presented afterwards and the error of this method is given.

同时本文作者提出了双向受剪承载力的三折线简化计算方法，对简化计算方法的误差进行了分析。

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A new spherometer based on self-reference laser shearing interferometric technique is described The principles and error analysis of the spherometer are given in detall.

本文根据自参考剪切干涉技术，采用球面补偿自准直原理，提出了一种新型激光干涉球径仪。

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