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Propane: Propane is a gas that is obtained from the refining process of crude oil or petrochemicals. When propane is compressed at low pressure then it is converted into useable gas known as LPG (Liquefied Petroleum Gas)....

Medical Alarms A medical alarm is an alarm oriented system aimed to indicate the presence of a hazard which may call for serious attention and refer for emergency medical operates. Personal Emergency Response System (PERS) or...