COAXIAL shaft, Two shafts rotating one inside the other for rotating the low and high pressure compressors by the low and high pressureengine turbines.
同心轴，两个套在一起旋转的轴。用于使发动机低压和高压涡轮分别带动低压和高压压气机。
2
If oil pressure was low and pump is within specifications, inspect for worn engine bearings or other reasons for oil pressure loss.
如果油压低并且泵在规格表内，则针对油压低的问题检查磨损的引擎轴或其它原因。
3
Stop engine, find causes and remove faults when oil pressure is low, water temperature is high, abnormal smokes or noise happen.