In this paper, We give two equivalent statements of relative essential extension.

本文给出相对本性扩张的两个等价条件。

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We would like you to provide a room with a telephone extension. This is essential.

我们希望这个房间能有电话分机。这很重要。

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We would like you to provide a room with a telephone extension. This is essential.

我们希望这个房间能有电话分机。这很重要。

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