000 00247nam a2200073 4500
080 _a
_b
245 _aBS: 3185-1959; Heavy-duty composite units of air-break switches and fuses for voltage not exceeding 660v
700 _aBritish Standards Institution
260 _aLondon
_bBSI
_c1959
300 _a19p
999 _c24766
_d24766