000 00315nam a2200109Ia 4500
008 220201s1968 xx 000 0 eng d
100 _aIndian Standard Institution Manak Bhawan
245 0 _aIS:4794(Pi)-1968 Specification for push button switches
260 _bISI Manak bhawan
_c1968
300 _a23
942 _2ddc
999 _c76166
_d76166