Hydrometer: An instrument used for measuring the specific gravity of a liquid or solution.

比重计：量度液体或溶液的比重的仪器。

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An instrument used to measure pressure. A manometer consists of a U-shaped tube partially filled with a liquid that can vary in specific gravity from 1.0 (water) to 13.57 (mercury).

测量压力所用的一种仪器，压力计由部分装有相对密度在1.0(水)至13.57(汞)范围内的液体的U形管组成。

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The medium of is suspending liquid with high density. Under the action of centrifugal force the minerals are separated according to their specific gravity in the heavy medium cyclone.

重介质旋流器的介质为高密度悬浮液，在离心力的作用下，矿物主要在重介质旋流器中按比重分离。

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