Lifting desk and chair parameters: Size: desk 600*400*640-760mm; The class chair is 420*400*360-440mm. Configuration requirements: A. Panel 1. Size: 600*400MM+5mm 2. Material: The desktop material is injection molded with E1 grade 18MM environmentally friendly density board and environmentally friendly PP plastic. 3. Function: Straight edges around the perimeter can improve the general straight edge desktop on wrist discomfort and bad effects during class and writing; The desktop is flat with a pen slot, which does not affect the use of the reverse side of the exam; In order to ensure the comfort of use, the height of the plastic edge banding on the board surface should not be higher than 1MM on the board surface. The color is light blue, light green, silver oak grain, according to the user, the surface fine lines bite the flowers, not reflective. B. Book case 1. Material: cold-tied steel 0.8mm thick, stamped and formed by large mechanical hot pressing; 2. Inner diameter size: 450*300*130mm Function: one stretch forming without sharp corners, safe to use. C table steel frame 1. Shape: welded by oval steel pipe and square steel pipe, the structure is firm, and it will not cause shaking or looseness after long-term use, and the height of the bracket can be adjusted. 2. Material function: the main bracket of the table and chair: the lower bracket is 30MM×60MM pipe wall 1.2MM oval steel pipe, the upper bracket is 25MM×50MM pipe wall 1.2MM oval steel pipe, the horizontal is 25MM×50MM pipe wall 1.0MM oval steel pipe, the bucket frame is made of 20MM×20MM pipe wall 1.0MM square steel pipe, the seat frame is made of 20MM×40MM pipe wall 1.2MM oval steel pipe. 3. Surface coating: The welded steel pipe frame is pickled, degreased and phosphating on the surface, which is corrosion-resistant and rust-proof. The surface is made of first-class granular powder, which is painted by high-temperature powder, with strong adhesion and no paint peeling. The coating should be free of leakage and rust; The coating should be smooth and uniform, with consistent color, and should be free of defects such as sagging, pimples, wrinkled skin, and flying paint. The coating should be flat, smooth and clear, and there should be no obvious particles and rising edges. There should be no obvious processing marks, scratches, fog, white edges, white spots, bubbles, oil white, sagging, shrinkage, bristles, powder accumulation and impurities, D. Foot pads 1. Material: PE plastic first-class new material is integrated injection molding, and cannot be produced from recycled materials. 2. Function: The foot pad is locked with screws, firm and not loose: the bottom needs to be flat and non-slip, which increases the friction with the ground and makes the desk and chair more stable. E. Hook 1. Made of 5MM high wire. 2. Function: welded and fixed on both sides of the bookcase, simple and firm, can reach the hanging items and water bottles, and can withstand the weight of 20 kg of hanging objects. F. Backrest 1. Material: Formed by PP first-class new material large injection molding machine. 2. 400*355MM soil 5mm 3. Function: The combination with the steel pipe requires a straight plug-in type, and the screw lock is added to ensure that it is firm and not shaken: easy to move: the surface is bitten, non-slip and non-reflective: the color is light blue, light green, gray, according to the user. G. Seat cushion 1. Material: hollow blow molding of PE first-grade new material. 2. Size: 420*400MM soil 5mm 3. Function: made of PP soft plastic, injection molding design, with cushion gravity, more comfortable to use: the seat surface has 90 penetrating air holes, allowing the seat cushion to circulate air, effectively preventing the discomfort caused by stuffiness: the color is light blue, light green, gray, according to the user.