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Two Years Rate Contract For Purchasing Of Isi Marked Centrifugally Cast (Spun) Ductile Iron Pressure Pipes Class K-7 And K-9 For Water Gas And Sewerage , D.I. Pipesclass K-7 , 100Mm Class K-7 , 150Mm Class K-7 , 200Mm Class K-7 , 250Mm Class K-7 , 300Mm Class K-7 , 350Mm Class K-7 , 400Mm Class K-7 , 450Mm Class K-7 , 500Mm Class K-7 , 600Mm Class K-7 , 700Mm Class K-7 , 750Mm Class K-7 , 800Mm Class K-7 , 900Mm Class K-7 , 1000Mm Class K-7 , 1100Mm Class K-7 , 1200Mm Class K-7 , D.I. Pipesclass K-9 , 100Mm Class K-9 , 150Mm Class K-9 , 200Mm Class K-9 , 250Mm Class K-9 , 300Mm Class K-9 , 350Mm Class K-9 , 400Mm Class K-9 , 450Mm Class K-9 , 500Mm Class K-9 , 600Mm Class K-9 , 700Mm Class K-9 , 750Mm Class K-9 , 800Mm Class K-9 , 900Mm Class K-9 , 1000Mm Class K-9 , 1100Mm Class K-9 , 1200Mm Class K-9
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