When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be __________ the bearing modulus.

When the bearing is subjected to large fluctuations of load and heavy

1.	When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be __________ the bearing modulus.
A.	15 times
B.	10 times
C.	20 times
D.	5 times
Answer» B. 10 times