| http://www.w3.org/ns/prov#value | - The heat exchange tank 23 contains a body 21 of volatile liquid, such as refrigerant, and the level of the liquid may be varied by flow between the container 23 and a second container 28 arranged in heat exchange relationship with the suction line l9, the lower portions of the two containers being connected by a conduit 29 so that liquid refrigerant may flow from one to the other.
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