油管路、主机回油过滤器易堵塞；
The oil pipeline, the main engine oil discharge filter easy to stop up;
由于收尘面积小，易堵塞，只能过滤较大的灰尘，过滤效果很差。
Because the area is small, easy to collect dust jams, only larger dust filter, the filtering effect is very poor.
由于收尘面积小，滤纸易堵塞，只能过滤较大的灰尘，过滤效果不佳。
Because the area is small, to collect dust filter paper easily blocked filter, can only large dust, filtering the effect not beautiful.
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