Trunk type diesel engine pistons are effectively cooled when heat is（）<br>A:radiated through the engine block<br>B:transferred to water cooled cylinder walls<br>C:conducted through the piston crown<br>D:transferred to escaping exhaust gases

Trunk type diesel engine pistons are effectively cooled when heat is（）
A:radiated through the engine block
B:transferred to water cooled cylinder walls
C:conducted through the piston crown
D:transferred to escaping exhaust gases

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