… or forcing action of a piston or plunger driven within a cylinder, the inlet and outlet being regulated by valves. … to force the liquid to heights or against pressure. Multi-cylinder pumps are used for increased output. The cylinders may be either in line or in a star shape. This …
… unit and a valve for reversal of the cooling/heat cycle (reversible heat pumps) 8415.82 - - Other, … system fitted with a valve for reversal of the cooling/heat cycle, to perform the dual function of heating and cooling premises. In the cooling cycle, the reversing valve directs the flow of hot, high …
… formula H n+2 P n O 3n+1 , where n is 2 or more, and a cyclic series of general formula (HPO 3 ) n , where n is 3 … to the orthoacid. (2) Metaphosphoric acids. These are the cyclic acids exemplified by cyclo ‑triphosphoric acid (HPO 3 ) 3 and cyclo …
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