TM 9-4520-260-13
V
VALVE - A device used to control the flow of a fluid.
VAPOR - The gaseous form of any substance which is usually a liquid; vapors are present in the air around the
substance.
VENTILATE - To provide with a source of fresh or uncontaminated air.
W
WELD - A union or joint (of metals) produced by applying heat, sometimes with pressure.
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