Adjust the related dimension for level and vertical direction with metal strip ruler and gradienter, request level error is no more than 1 mm / m , total error is no more than 3 mm.

• 使用钢带尺及水平仪校准框架水平及垂直方向的尺寸，要求水平误差不超过每米1毫米，总误差不超过3毫米。