Record Volume Group ID V77 in this example for future reference.

记录这个示例中的卷组IDV77，以备将来进行引用。

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The chamber is first filled to a reference level and the volume recorded.

把水银装入容器中达到一个参考高度，记录此时的水银体积；

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The chamber is first filled to a reference level and the volume recorded.

把水银装入容器中达到一个参考高度，记录此时的水银体积；

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