IS : 2548-1967 specification for plastic water -closet seats &
I. S. I. Manak Bhawan
IS : 2548-1967 specification for plastic water -closet seats & - Manak Bhavan Delhi I. S.I 1968 - 11
/ ISI
IS : 2548-1967 specification for plastic water -closet seats & - Manak Bhavan Delhi I. S.I 1968 - 11
/ ISI