15-12073-1987 rec for modular coord:coord:size for doorsets & wondowets
Burean of India Standerdes
15-12073-1987 rec for modular coord:coord:size for doorsets & wondowets - New Delhi B I S Dec-87 - 7
/ BIS
15-12073-1987 rec for modular coord:coord:size for doorsets & wondowets - New Delhi B I S Dec-87 - 7
/ BIS