这些壳的内部划分成许多充气室。

These shells were divided internally into gas-filled Chambers.

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'罗莎充气室'。哪一个能已经在我们的祖母的花园内称赞的这牡丹芳香并且保持肯定的价值。

Paeonia officinalis' Rosa Plena '. This peony which one was already able to admire in the gardens of our grandmothers is very fragrant and remains a sure value.

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然后根据压力的不同对炉室进行了分类。最后详细论述了抽真空充气系统的综合方法及工作原理。

Then, the furnace hearths are classified according to pressure, with their evacuating charging systems and its working principle discussed in detail.

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