This is most impotant role in our life .this quality is best and right .
Its gives coldness .in summer season need of this . Whenever on of this then all room is cold . we feel well.furthermore its best quality .privilaged people cannot get to this . but affluent people can simiply take ot it . it made by techologi of science . in modern time this quality is forward also and many benifites also . I hope that it will more advanced . even more better in this time . we know that it will be like of all.
