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The chair lack a angle is designed for the people sitting for a long time.According
to ergonomics Its comfortable when the angle of the chair and the ground is 20°
while people sitting.To chasing for comfort,people will unconciously bent his waist or tilt chair forward
bent form the waist would finally lead to spinal injuries .If tilt the chair instead,it will become
unstable and easy to fall.
This chair have a surface which have an angle with the ground that would make the incline thing
much more dtable.
zhengzhou university of light industry