单选题Which is not the maintenance work for shaft bearings in transmission system?（）Acheck oil level in bearing sumpBcheck them for leakagec through end sealsCpump bilges in timeDcheck temperature
单选题
Which is not the maintenance work for shaft bearings in transmission system?（）
A
check oil level in bearing sump
B
check them for leakagec through end seals
C
pump bilges in time
D
check temperature
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