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。
The design and fabrication of coating machine for industrialization of single-layered organic photoconductor were studied.
同时研究了单层有机光电导体产业化的关键生产设备设计的主要参数与制造技术的要点。
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