采用冲击破碎和气流分选技术对废线路板的机械分离过程进行了研究。

An effective mechanical process including impact crushing and pneumatic separation for metal recovery from printed circuit boards scraps was investigated.

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该文以单兵火箭冲击射流流场为研究对象，采用数值模拟技术，对定向器管尾附近区域的燃气流场进行了数值计算，给出了发动机工作早期阶段冲击射流噪声场形成过程的计算结果。

Taking the impact jet flow field of individual rocket as research object, this paper calculates the jet flow field near the back of the launching tube by using the numerical simulation method.

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