TY - GEN ED - BRITISH STANDARDS INSTITUTE TI - BS 787 : pt.4: 1972 : specification for mining type flameproof gate-end boxes : pt.4 Gate-end boxes for drilling machines(for use on 3-phase a.c. circuits up to 650 v) PY - 1972/// CY - London PB - British Standards Institute KW - BRITISH STANDARDS N1 - STD 179 ER -