... narrow-line emi ion 窄带发射 natural embedding 自然嵌入 Naxas emery 天然刚玉 ...
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The changing pattern of the natural vibration characteristics of thin rectangular elastic plate is studied under the boundary conditions of elastic support and elastic embedding.
研究了在弹性支撑和弹性嵌固边界条件下，弹性矩形薄板固有振动特性的变化规律。
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