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发动机正常工作应该是运转平稳,没有杂音和异响,若有不正常的响声,应及时查找原因给于排除,以保证发动机始终处在良好的工作状态。
The normal work of the engine should be smooth operation, no noise and abnormal noise, if there is abnormal sound, should promptly find the reasons for the exclusion to ensure that the engine is always in good working condition.