求翻译：　　最后还要确定，在频繁工作之后制冷剂是否足够。利用干燥器的观察窗，可以检查制冷剂液面高度。玻璃窥视孔通常安装在干燥器的盖子上面，运转发动机和空调系统，透过玻璃窥视孔观察制冷剂的流动情况。如果空调机工作正常，可从窥视孔内看到清澈的冷冻液在不停地流动，并且在高温时还偶尔夹带着些小气泡，在关掉空调系统的时候也能够看见小的气泡。是什么意思？

Finally determined, after the refrigerant in the work frequently enough. Observation window using the dryer, you can check the refrigerant liquid level. Glass peep-hole is usually installed in the lid above the dryer, run the engine and air conditioning systems, through the glass peep holes in the r

Finally, it is required to determine whether the frequent work refrigerants after sufficient. Dryers use the observation window, you can check refrigerant liquid level. Glass peep-hole above the lid is usually installed in dryers, functioning engines and air-conditioning system, through the glass pe

　　Finally also must determine, after frequent work the refrigerant is whether enough.Using the water extractor observation window, may inspect the refrigerant liquid level altitude.The glass peep hole usually installs above the water extractor cover, revolves the engine and the air-conditioning syst

　　Finally, to determine, after the frequent refrigerant is enough. Dryer observation window, you can check the refrigerant liquid height. Glass peep hole is typically installed on top lid of the dryer, functioning engine and air conditioning systems, through the glass peephole observations of refrig

　　Finally, to determine, after the frequent refrigerant is enough. Dryer observation window, you can check the refrigerant liquid height. Glass peep hole is typically installed on top lid of the dryer, functioning engine and air conditioning systems, through the glass peephole observations of refrig