Contrast with single base gun propellant with polymer coating layer, the two-layered variable-burning rate propellant has good properties of progressive combustion and low temperature coefficient.
与高分子包覆单基发射药相比，双层结构变燃速发射药具有较好的燃烧渐增特性和明显的低温度系数效果。
2
On the base of this analysis, this dissertation puts forward that it is better for our large household electric enterprises to take cautious and progressive strategic train of thought.
对于我国大型家电企业跨国经营战略思路，采用定性理论分析与战略模型的研究方法。
3
The method will be regarded as the base of ongoing clinical using and the progressive study of activity and immunity.