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(本文由瑞士工业公司(SIG)发展部负责人 Bernhard Krayer 工程师撰写,主要介绍了粒状咖啡和粉状咖啡使用的保香阀的作用,优点及其使用价值。)
(This article was written by Bernhard Krayer, engineer at the head of development for the Swiss Industry Corporation (SIG)) and describes the role, benefits, and value of savory valves for grainy coffee and powdered coffee.)