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The structure, working principle and application of centrifugal - flow thin-film vacuum evaporator were introduced.

本文介绍了离心薄膜真空浓缩设备的结构工作原理及它的应用。

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Its structure, working principle, strength, assembling procedure and popularization are described.

本文介绍了新型套管头的结构、工作原理、强度、安装操作及推广应用。

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In principle, the tri-partite structure of three working groups encompassing basic science, adaptation and economics should produce a relatively coherent whole - more so, and with a more impressive imprimatur, than if each were assessed on its own, perhaps against the backdrop of turf wars.

BBC: Climate panel signs off reforms - but how ambitious?