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构造了一种迭代法求一类矩阵方程的最小二乘双对称解。
An algorithm was constructed to solve the least squares bisymmetric solution of a class of matrix equation.
连杆式门闩系统用于控制圆拉杆或扁拉杆通过双对称，左右门均适用。
Rod-Latch system to control round or flat rods. RH and LH application through double symmetry.
在极限情形下，不仅可以还原为已有的结果，而且给出带双对称裂纹的圆形孔口在裂纹尖端的应力强度因子。
Under the conditions of limitation, not only known results can be obtained but also the solutions of the SIFs at the crack tip of a circular hole with two symmetrical cracks were found out.
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