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An iron lung is a type of negative pressure ventilator, a mechanical respirator that encases the thoracic cavity and creates a controlled air pressure environment to stimulate breathing in a person suffering from poliomyelitis, neuromuscular disorders, or other conditions that result in respiratory muscle paralysis.

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Soaking is the process of submerging a solid in a liquid for a period of time, allowing the liquid to permeate the solid or for the solid to absorb the liquid. This can be done for various purposes such as cleaning, hydrating, dissolving, or initiating a chemical reaction.

A coffer is/are a recessed panel in a ceiling, dome, soffit, or vault. Often found in classical architecture, coffers are decorative sunken panels that can be square, rectangular, or octagonal in shape and serve both aesthetic and structural purposes, such as lightening the weight of a ceiling or dome. The term “coffer” also refers to … Đọc tiếp