supply and delivery of liquid chlorine of 1065.00 mts in 1000 kgs suppliers cylinders and 50.00 mts in 100 kgs board cylinders as per is-646/1986 to various destinations of hmwssb (kdwsp ph-i, ii and iii/himayathsagar water supply system ) for a period of (6) six months, under qat wing, a.f beds, hmwssb. .