Injectors for use with heavy fuel oil must be cooled by either water or light oil to （）<br>A:prevent heat corrosion to internal components<br>B:increase fuel delivery rate and economy<br>C:prevent pre-ignition<br>D:avoid carbonization of the nozzle tips

Injectors for use with heavy fuel oil must be cooled by either water or light oil to （）
A:prevent heat corrosion to internal components
B:increase fuel delivery rate and economy
C:prevent pre-ignition
D:avoid carbonization of the nozzle tips

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