(1)First loose screw of beam ring,remove the frame,the fine mesh broken removed and replaced with a new fine mesh.
(2)The fine mesh tile in the mother mesh,again put the upper ledge back in place,fine mesh stretched by hand from the surrounding.At both ends of the machine on the side edge of the box,each using a universal clamp,the clamp on the upper frame and the next frame.
(3)The fine mesh around the protruding edge of the frame except reserved two centimeters,the rest all cut.
(4)Beam ring Again put,loose universal clamp.Then tighten the screw of beam ring.
(5) Evenly beat around the beam ring with a soft hammer,locknut,that completed the replacement of a fine mesh.