Abnormal sound of chafing was heard from the crane during running test.
起重机在运转试验中，发现有不正常的磨擦声响。
An abnormal sound, usually emanating from the heart, that sometimes indicates a diseased condition.
心杂音不正常的声音，通常由心脏发出，有时意味着有。
During running, stop it at once when noise or other abnormal sound is heard to find the cause and settle it.
运转过程中，如发现噪声或其他不正常的声音时，应立即停车，检查其原因，加以消除。
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