الوصف

This is a common type of sofa for the home. Most of the sofas sold on the market are of this type. It has two support points to support the user's lumbar spine, thoracic spine, can get with the body back with the effect of curved surface. Such sofas backrest and seat angle is very critical, the angle is too large or too small will cause the user's abdominal muscles are strong, fatigue. Similarly, the width of the sofa seat surface should not be too large, usually within **0 mm according to the standard requirements, so that the user's calves can adjust the sitting position at will, rest more comfortable.