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1. |
What is the value of gap maintained in ECH? |
A. | 0.025 to 0.075 mm |
B. | 0.075 to 0.250 mm |
C. | 0.250 to 0.750 mm |
D. | 0.750 to 2.50 mm |
Answer» C. 0.250 to 0.750 mm | |