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5.4.1.2.3 两轴线的平行度 这种检验应在两个平面内进行:在通过该两轴线的第一平面内然后在尽可能垂直于第一平面的第二平面内。 通过两轴线的第一平面是指通过其中的一根轴线并尽可能接近第二根轴线的平面。 5.4.1.2.3.1 在通过两轴线的第一平面内检验
5.4.1.2.3 Parallelism of two axes This test shall be carried out in two planes: in a first plane through the two axes and then in a second plane that is as perpendicular as possible to the first plane. The first plane through both axes refers to a plane that passes through one of the axes and is as close as possible to the second axis. 5.4.1.2.3.1 In the first plane through the two axes of inspection