单项选择题
A.an isochronous governor
B.elastic engine mounts
C.a vibration damper
D.a cast iron bed plate with good flexible qualities
单项选择题 The air supplied to a diesel engine is compressed to （） (1) provide heat for the ignition of the fuel (2) decrease injection delay
单项选择题 In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.
单项选择题 The amount of fuel injected in a particular time, or degree, of crankshaft rotation is termed （）.