A spacer is generally something used to create a space between two objects, often to properly position them. There are also a number of specialised usages for the term.
An asthma spacer or commercially referred to as a "Valved Holding Chamber" (VHC), is a device used by an asthmatic person to increase the effectiveness of an asthma inhaler.
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Edgetech and Dow Corning to present at Silicone Technology for 21st Century Facade conference Read more... Edgetech is offering continuing education credits at the Architects ...