What is the value of gap maintained in ECH? – McqOptions

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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

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