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KS V15,
* KS V15, | Reinforced concrete for sewer, water- and gas pipeline networks of type
key word and on class concrete on compression strength of Â15, marks on
freezing resistance of F50, watertight of W4
| PO V15
* PO V15 | Reinforced concrete for sewer, water- and gas pipeline networks of type
key word and on class concrete on compression strength of Â15, marks on
freezing resistance of F50, watertight of W4
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