A dirty fuel oil filter is can be detected by （） Ⅰ.fuel oil analysis Ⅱ.observing the pressure drop across the filter<br>A:Ⅰonly<br>B:Ⅱonly<br>C:eitherⅠorⅡ<br>D:neitherⅠnor

A dirty fuel oil filter is can be detected by （） Ⅰ.fuel oil analysis Ⅱ.observing the pressure drop across the filter
A:Ⅰonly
B:Ⅱonly
C:eitherⅠorⅡ
D:neitherⅠnor

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