The paper introduces how to prepare the sample of multi-wave band laser protection plastics based on PMMA and test its property.
本文以PM MA为基质制备了多波段激光防护塑料样品，对其性能进行了测试。
Based on the broad-band random vibration test on a clamping support in missiles, this paper investigates the problems on evaluating the attachment bolt looseness in the structure.
本文在某支撑座结构模型宽带随机振动实验的基础上，研究了如何监测连接螺钉组松动故障程度的问题。
This paper is a report on the study of the feasibility of the National Oral Test for English Majors - Band 8.
本文根据“全国英语专业八级口试的可行性研究”课题的结项报告改写而成。
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