单选题Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）AscavengingBforced draftCturbo-chargingDaspiration
单选题
Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）
A
scavenging
B
forced draft
C
turbo-charging
D
aspiration
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