MCQOPTIONS
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| 1. |
ECL was invented in _______ by __________$ |
| A. | 1956, Baker clamp |
| B. | 1976, James R. Biard |
| C. | 1956, Hannon S. Yourke |
| D. | 1976, Yourke |
| Answer» D. 1976, Yourke | |