Telephone ringing and speech circuits. Magneto-generator characteristics, magneto-operated bell. Coupling unit.
- You cannot add another "BS 326:1928" to your cart. View cart

BS 2733:1956
Original price was: $264.16.$132.00Current price is: $132.00.
Specification. Intrinsically safe magneto-call telephones primarily for use in coal mines
BSI Group , 03/14/1956


