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A manual piston espresso machine made by Elektra The piston-driven, or lever-driven, machine was developed in Italy in 1945 by Achille Gaggia, founder of espresso machine manufacturer Gaggia . The design generically uses a lever, pumped by the operator, to pressurize hot water and send it through the coffee grounds.
A descaling agent or chemical descaler is a liquid chemical substance used to remove limescale from metal surfaces in contact with hot water, such as in boilers, water heaters, and kettles. Limescale is either white or brown in colour due to the presence of iron compounds. Glass surfaces may also exhibit scaling stains, as can many ceramic ...
SAGE Publishing was a founding member of the Open Access Scholarly Publishers Association (OASPA) when it was established in 2008. [13] In November 2013, OASPA reviewed SAGE's membership after the Journal of International Medical Research accepted a false and intentionally flawed paper created and submitted by a reporter for the journal Science as part of a "sting" to test the effectiveness of ...