The concentrated sodium hydroxide is filtered through a pressure filter.

浓缩过的氢氧化纳通过压滤机过滤。

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Filtration operation is in constant pressure differentials, called the constant pressure filter.

过滤操作是在恒定的压差下进行，称为恒压过滤。

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The process characteristics of disc vacuum filter and pressure filter are introduced respectively.

介绍了圆盘真空过滤机和加压过滤机在浮选精煤脱水方面的工艺特点。

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Higher pay for teachers at elite pre-schools filter down to upward wage pressure for teachers elsewhere.

FORBES: Is the preschool rat race a sign of doom?

It would also greatly reduce energy costs, since reverse osmosis involves forcing water through filters to remove minerals, and the Perforene filter is so thin that much less pressure is required (graphene is a thousand times stronger than steel).

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