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The detected amounts “pose no risk to patients, staff or visitors,” the hospital said, adding a "certified medical air gas specialist was brought in to inspect the infrastructure of the system, with zero leaks detected."

The compressed air gas sprayer comes next in point of simplicity and cost for a power sprayer.

This gas, through the action of the air upon the fuel, is called "air gas," in order to distinguish it from the "water gas" formed in the second period of the process.

It is used in making air gas, and in giving illuminating power to water gas.

The temperature thereupon quickly rises in the generator, A, while, at the same time, the combustion of the air gas produced soon reheats the chambers, B'.