1. Sheet metal cabinets are not allowed to have visible tilting or localized crooked or twisted phenomena. The perpendicularity between the frame column and the base is less than 1.5mm, and the detection is based on the upper surface of the base, with the inner surface of the upper end of the column as the measurement point.

2, the top frame and the base parallelism is less than 1mm, the detection point for the base of the upper surface and the top of the frame surface, and each other as a benchmark. Can also be measured by the length of the diagonal of the six sides, the difference shall not exceed 2.5mm to detect. If there is a partition board, the parallelism between the top frame and the base can be relaxed to 1.5mm, and the parallelism between the partition board and the top frame or the base is less than 1mm.

 
3, the absolute value of the diagonal difference between the top and bottom frames is less than 1.5mm.
 
4, the columns can not be twisted, the columns and the upper and lower frame connected to the two ends of the intersection line and the frame adjacent to the parallelism of the plane is less than 0.5mm.
 
5, the slide to support the insertion box, the same layer of left and right slide composed of the working surface relative to the upper surface of the base parallelism is 1mm, and should ensure that the insertion box is loaded into the gap between the two adjacent panels of the absolute value of the difference between the two panels shall not exceed 0.6mm.
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