单项选择题
A.jacket water outlet
B.cooling water pump outlet
C.heat exchanger outlet
D.expansion tank atmospheric vent
单项选择题 With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to （）.
单项选择题 The bearings used to support the crankshaft are generally called （）
单项选择题 Improper maintenance of an automatic auxiliary boiler oil burner could result in （）.