00418nam a2200169Ia 4500 Bureau of Indian Standards Engineering Drawing BK 60 SP 46:2003 Engineering Drawing practice for schools and colleges SP46:2003 Bureau of indian standards 1989 604.2 BIS 205 ENGLISH 18701 18701 0 0 0 0 CRC CRCE CRCE 2023-03-17 B.I.S 864.00 0004885 dt 09/02/2010 0 604.2 BIS 20377 2023-03-17 2160.00 0000-00-00 BK