Before starting a diesel engine, you should always（）<br>A:check the pyrometer readings<br>B:check the crankcase oil level<br>C:check the fuel oil strainers<br>D:clean the fuel system

Before starting a diesel engine, you should always（）
A:check the pyrometer readings
B:check the crankcase oil level
C:check the fuel oil strainers
D:clean the fuel system

出自：海船船员证

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