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98.摩托车在消声器口发出“砰砰”放炮声的原因是什么? 摩托车消声器口发出“砰砰”的放炮声是因为气缸内燃烧不完全所引起的,对发动机非常有害。
98. motorcycle muffler mouth issued a “banging” What is the reason of the sound of blasting? Motorcycle muffler mouth issued a “banging” blasting sound is due to incomplete combustion caused by the cylinder, the engine is very harmful.