叙述了用玻璃纤维增强的环氧树脂复合材料等来复制古代大型天文简仪龙柱的工艺试验和制作过程。
This paper describes the technological test and the making process of the Abridged Armilla with the ancient large astronomy in epoxy-glassfiber reinforced composites, etc.
流变振动仪利用等截面杆的纵向简谐振动来测定材料的阻尼，十分方便和有效。
This paper presents a simple method for measuring gas adiabatic constant by use of simple harmonic oscillation.
流变振动仪利用等截面杆的纵向简谐振动来测定材料的阻尼，十分方便和有效。
This paper presents a simple method for measuring gas adiabatic constant by use of simple harmonic oscillation.
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