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Year: 2020

principle of Oxygen concentrator

How Does an Oxygen Concentrator Work?

Oxygen concentrators are medical devices that assist people who have a low level of oxygen in their blood. They are powered by plugging the device into an electrical outlet or by using a battery. If a battery is used, then it will need to

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Mask standard

The face mask standard of different country

When we are purchasing the face mask, we must identify the standard number for getting the authorized face mask. Every country has own face mask standard, their difference of the standard is the filtration efficiency

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