一个物体,如果我们可以把它看作刚体,只要它的基准面上有二个相互垂直的位置是水平的,我们就说这个物体是水平放置的,或说物体的水平度是好的。水涡轮、大轴、镜板等部件安装时,它们的水平度就是根据这个道理测量检查的。通常使用的水平梁测量座环水平的方法(以下称为直径法), An object, if we can think of it as a rigid body, as long as it has two horizontal positions perpendicular to each other on the plane of reference, we say that the object is placed horizontally or that the level of the object is good. Water turbine, large shaft, mirror plate and other components installed, their level is based on the principle of measurement and inspection. A commonly used method of measuring the level of the seat ring by a horizontal beam (hereinafter referred to as a diameter method)