Specification for Concrete Pipes (with and without reinforement)
IS-428-1971
Specification for Concrete Pipes (with and without reinforement) Specification for Concrete Pipes (with and without reinforement) IS-428-1971; - ISI
Specification for Concrete Pipes (with and without reinforement) Specification for Concrete Pipes (with and without reinforement) IS-428-1971; - ISI