Although {HEAD ~ the primary use} of {TAIL ~ the present invention} is to separate a volatile substance, such as a chlorinated solvent, from a nonvolatile liquid, such as hydraulic fluid, the term substance may also include other liquids, gases or small particulate solid material 
Although { HEAD ~ the primary use } of { TAIL ~ the present invention } is to separate a volatile substance , such as a chlorinated solvent , from a nonvolatile liquid , such as hydraulic fluid , the term substance may also include other liquids , gases or small particulate solid material
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