Hebei: referred to as "Hebei", surrounding the embrace of the capital.

Browse  In this vast land of China, each province has its own unique abbreviation. Do you want to know what they are? Listen to me reveal them one by one! There will never be "*" and "#", only pure dry goods!Abbreviation for the provinces of Renqiu on the map of China

Renqiu China Rescue and Fire Academy Enrollment Guide
Ren Qiu China won nine gold medals

Renqiu China Fire and Rescue Academy Score 2020TimeRenqiu China Fire Academy ranked in the top 10Article information
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液体激光器的研究现状  从激光介质分类来看,液体激光器研究主要沿着两个方向。一个是有机染料激光器,另一个则是掺稀土金属离子的无机液体激光器。  有机染料激光器发展至今已经有了长足的进展,上百种染料分子被应用为激光介质,染料激光介质的荧光光谱非常宽,使得人们可以在一种激光介质中相当宽的光谱范围内获得受激辐射作用,摆脱原子能级对波长选择的束缚。在提高功率输出方面,有机染料激光器也取得了一定的成果。  掺钕离子无机液体激光材料是液体激光材料研究领域中的热点,有机溶液体系中,由于C-H键等化学键的振动能量非常接近钕离子受激辐射光子能量,两者之间的相互作用,大大降低了激光上能级粒子数得累计,因此掺钕离子的有机溶液体系难以产生激光。国内工程物理研究院的徐正等采用激光二极管抽运Nd3+-POCl3-ZrCl4体系,开展了横向抽运液体激光的出光实验,输出的最大单脉冲能量达到46.8mJ,光光转换效率达到了14%。

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Guangdong: referred to as "Guangdong", the land of the south. Fishing! 🌱 The landscape is the best in the world, and the culture of Guangfu is mellow; ️ Reunion, try morning tea!