TTTI
ELECTRICAL TRANSFORMERS FOR INCREASING AND REDUCING THE VOLTAGE OF AN ELECTRICAL POWER SUPPLY TO ALLOW A PARTICULAR PIECE OF ELECTRICAL EQUIPMENT TO BE USED; COMMUTATORS FOR ALTERING THE DIRECTION OF AN ELECTRIC CURRENT; VOLTAGE STABILIZER FOR DIMINISHING THE VARIATION OF VOLTAGE AND ELECTRIC CURRENT
Cancelled · March 7, 2001 · 76220839 ·