(n.) Any of various devices, as a helix of flat metal strip, introduced into a boiler tube to increase the heating effect of the fire.
RETARDER
Meaning of RETARDER in English
Webster's English dictionary. Английский словарь Webster. 2012
(n.) Any of various devices, as a helix of flat metal strip, introduced into a boiler tube to increase the heating effect of the fire.
Webster's English dictionary. Английский словарь Webster. 2012