US Army New Training Helicopter(NTH)is a non-developmental item commercial helicopter which is to replace Bell UH-1H as an initial en- try rotary wing and primary instrument trainer.
This paper, based on five kinds of strategic consideration, introduced four optimal reservation and developmental strategic control model of non-renewable resources.
在进行了五种战略思考的基础上，构建了四个不可再生资源的最优储备与开发的战略控制模型。
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The paper expounds the importance and developmental prospect of rationally utilizing non-wood fiber and points out that it is one way to solve the problem of environmental pollution.