They had special armour on the inside of the aircraft. They had forward-looking infraredradar, avoidance radar, air-to-air refuelling probes.
直升机内部还有特殊的装甲、前视红外雷达、障碍回避雷达、空中加油探头。
2
This author studies liquid level method, he puts forward the method of infraredradar liquid level applied pulse compared . It may be used to measure liquid level accurately.