Diesel engine piston seizure can be caused by （）<br>A:poor cooling of cylinder walls<br>B:improper cooling of the piston<br>C:insufficient piston lubrication<br>D:all of the above

Diesel engine piston seizure can be caused by （）
A:poor cooling of cylinder walls
B:improper cooling of the piston
C:insufficient piston lubrication
D:all of the above

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