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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 retarder
 遲縮劑

From: Webster's Revised Unabridged Dictionary (1913)

 Re·tard·er n.
 1. One who, or that which, retards.
 2. Steam Boiler Any of various devices, as a helix of flat metal strip, introduced into a boiler tube to increase the heating effect of the fire.
 3.  Photog. A substance, as potassium bromide, added to a developer to retard its action.
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