1. Su�rez returned to the WTA doubles circuit in London Summer Olympics Games. 2. Injection locking has also been used in high performance frequency doubling circuits . 3. On the ATP Tour he made his appearances mostly in the doubles circuit . 4. Television receivers either required a transformer or could use a voltage doubling circuit . 5. Class 1 power ceramic capacitors are used for voltage-doubling circuits . 6. Our main thing is to dominate the doubles circuit , 7. On the doubles circuit , Sauer had his best performances partnering countryman Schalk van der Merwe. 8. Murray's elder brother, Jamie, is also a professional tennis player, playing on the doubles circuit . 9. Babylon covered more than three square miles, surrounded by moats and ringed by a double circuit of walls. 10. He was more successful on the doubles circuit , winning his first career title in the 1986 Geneva Open.
