In order to prevent this accident, you can cycle of suction nozzle installed prior to a 80-120 purpose entirely NET, on namesisapi nonsoluble, to remove impurities.

• 为了制止呈现这种变乱，可以在轮回解的吸嘴后安设一个80-120纲的残属网，差油不朱举行功滤，以裁撤不溶性的杂质。