Technical requirements: 1. The allowable deviation for the height and width of the door leaf is ± 2, the allowable upper deviation for the thickness of the door leaf is+2, and the allowable lower deviation is - 1, the allowable deviation for the height of the inner rabbet of the door frame is ± 3, and the allowable deviation for the width of the inner rabbet and the side wall is ± 2. 2. The clearance between the door leaf and the upper frame shall be ≤ 3mm, the clearance between the door leaf and the binding surface of the door frame, the side of the door leaf and the door frame with hinges/locks and the upper frame