求助文献三篇

lisaruirui

求助文献，各位师兄师姐谢谢，有以下三篇; Z; t5 @4 w$ r4 p
1．Ergonomically designed kneeling chairs are they worth it? : Comparison of sagittal lumbar curvature in two different seating postures.
  t% ^/ V* _/ k4 S2．Chair design and the anesthesia provider.
1 [/ N- h) q$ r" T: B6 X3．Sitting and low back pain: the positive effect of rotary dynamic stimuli during prolonged sitting.9 v' L" }, [1 r+ e: }9 D+ L

hormone008

3333333333333333333
) P0 B& E, B! B+ s5 P  S, Wokay 了

lisaruirui

那第一个和第二篇有吗？