This paper will report the new achievements in our research on frequency tuning means of mix-structure co axial flow laser, especially on composite cavities of co laser suit for photochemistry.

本文报导了我们在混合型轴流一氧化碳激光器选频的研究成果，以及作者在适宜于光化学反应的轴流一氧化碳激光器主副腔方面的理论研究进展。

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The flow-induced self-sustaining oscillation and standing wave resonance of protruding and trap cavities are studied at the low speed range.

本文研究了低流速范围内突出式和陷落式圆柱形腔的流激自持振荡和驻波共振问题。

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It includes the distribution of mould cavities and flow channel, the mould automation and the relation between the plastics quality and the mould precision, and so on.

内容包括型腔与浇道的排布、模具自动化、塑件质量与模具精度的关系等问题。

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This would create cavities into which the bitumen, heated to more than a thousand degrees, would flow and from which it could then be collected.

NEWYORKER: Unconventional Crude