The gas economizer 2, wherein one end of {TAIL ~ a tube} is connected to the upper shell in register with the opening in the upper shell and the other end of the tube is adapted to be operatively coupled to an intake manifold of {HEAD ~ an internal combustion engine} 
The gas economizer 2 , wherein one end of { TAIL ~ a tube } is connected to the upper shell in register with the opening in the upper shell and the other end of the tube is adapted to be operatively coupled to an intake manifold of { HEAD ~ an internal combustion engine }
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