Two kinds of packing: i. e. carbon with fiber and soft graphite are used. The sealing effect is excellent for high pressure boiler F. W. P.

选用碳素纤维填料和膨胀石墨填料混合使用，密封效果良好。

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The actual gain peak value is much smaller than the simplified mode of F-P cavity, but the effect is light to the full width at half maximum with the mode of efficient cavity length.

有效腔长使实际增益峰值比f - P腔简化模型的预测值要小，但对半值全宽带宽的影响相对较弱。

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