00726nam a2200205Ia 4500003000900000008004100009040001600050080002600066110003300092245010600125260005000231300000800281500001900289650001800308650002700326650002100353942000700374999001500381952012400396IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a083.7:621.762.84bISI  aIndian Standards Institution 0aIndian standard dimensions for `o' rings and grooves for vacuum flangescIndian Standards Institution  aNew DelhibIndian Standards Institutionc1973  a7p.  aIS 6838 : 1973  a Standards   a Vacuum Flanges99102  aNASA Thesaurus   cBK  c5118d5118  00104070aBANbBANcGENd1976-12-22g5.00l0o083.7:621.762.84/ ISIp5717r2021-11-05v5.00w1976-12-22yBKGRs. 5.00