Signs should not be placed on movable objects such as doors, windows, shelves, etc., so as to prevent the sign from moving correspondingly with the parent object and affecting recognition. Obstacles that hinder recognition should not be placed in front of the sign.
Signs should not be located on doors, windows, racks and other movable objects, so as not to move the sign with the mother object correspondingly, affecting recognition, signs must not be placed in front of obstacles to recognition.
The sign shall not be set on the movable objects such as doors, windows and frames, so as to avoid the corresponding movement of the sign plate with the parent object, which will affect the reading. No obstacles shall be placed in front of the sign plate.<br>