Blow-off of the relief valves of the engines cylinders may be caused by （）.<br>A:too low lead<br>B:water in fuel<br>C:too tight spring<br>D:leakage

Blow-off of the relief valves of the engines cylinders may be caused by （）.
A:too low lead
B:water in fuel
C:too tight spring
D:leakage

出自：海船船员证

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