Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005 pressure (ˈpreʃə)noun 1.(the amount of force exerted by) the action of pressing.to apply pr...
using hot water boilers pressurized by own steam cushion created in a directly connected high level closed expansion header vessel was initiated around 1945, consequent upon functional and operational problems associated with the systems using the steam cushion and expansion space within steam boiler ...