noun
: a compound hydraulic valve used in gas manufacturing for regulating the passage of the gas through a set of purifiers so as to cut out each in turn for renewal of the lime
noun
: a compound hydraulic valve used in gas manufacturing for regulating the passage of the gas through a set of purifiers so as to cut out each in turn for renewal of the lime
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012