Tool life in the case of a grinding wheel is the time

1.	Tool life in the case of a grinding wheel is the time:
A.	Between two successive wheel dressing
B.	Taken for the wheel to be balanced
C.	Taken between two successive wheel balancing
D.	Taken for a wear of 1 mm on its diameter
Answer» B. Taken for the wheel to be balanced

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Tool life in the case of a grinding wheel is the time:

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