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一台沃尔沃L180型装载机,在正常作业中突然动臂起升缓慢,经现场试机发现,起升动力没有改变,动臂不下沉且无异常响声。
A Volvo L180 loader suddenly climbs slowly during normal operation. After the field test, it is found that the lifting power has not changed, the boom does not sink and there is no abnormal noise.