The basis axial line formula is derived.

同时建立了基准轴线的公式.

The determination method and computing formula of the permissible lateral and vertical deviation of arbitrary point on axial line of the target are discussed and derived.

讨论并推导了靶体轴线上任一点的允许横向偏差和允许纵向偏差的规定方法和计算公式。

After the crack initiating, it propagates along the vertical direction of the tensile stress axial line.

裂纹萌生后主要沿着与拉应力轴垂直的方向扩展.