As a criticalpart of helicopter, rotor blade anti-fatigue design technique is one of the key to improving safety life and decreasing cost.
作为直升机的关键动部件,桨叶的抗疲劳设计技术是提高桨叶安全寿命,降低桨叶使用成本的关键。
2
The fifth part is the criticalpart of the paper, which mainly discussed the suggestions in consummation on legal systems of China's petroleum resources safety.