本文将曲柄连杆压力机与液压增力压力机的特点作比较，并介绍液压增力压力机和正交增力机构的工作原理，进行正交增力机构增力系数的计算。
A crack press was compared with hydraulic force increasing press and the schematics of them were introduced, a force increasing ratio of the orthogonal force amplifier was calculated.
用近似解析方法推导出拉伸正交各向异性有限宽板偏心圆孔的应力集中系数的显式表达式，除了比较极端的情况外，该式的精度较好。
Using an approximate analytical method, the explicit expression of stress concentration factors is derived for an eccentric circular hole in a tension orthotropic finite-width strip.
用近似解析方法推导出拉伸正交各向异性有限宽板偏心圆孔的应力集中系数的显式表达式，除了比较极端的情况外，该式的精度较好。
Using an approximate analytical method, the explicit expression of stress concentration factors is derived for an eccentric circular hole in a tension orthotropic finite-width strip.
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