IS :3311-1965 specification in waste plug & its access for sinks and wash -basins
I. S. I. Manak Bhawan
IS :3311-1965 specification in waste plug & its access for sinks and wash -basins - Manak Bhavan Delhi I. S.I 1965 - 8
/ ISI
IS :3311-1965 specification in waste plug & its access for sinks and wash -basins - Manak Bhavan Delhi I. S.I 1965 - 8
/ ISI