| 单词 | tack coat | 
| 释义 | > as lemmastack coat   tack coat  n. (see quot. 1954). ΘΚΠ society > occupation and work > materials > raw material > mineral material > mineral and fossil resins > 			[noun]		 > bitumen or pitch > coat of tack coat1949 1949    Sun 		(Baltimore)	 17 Oct. 26/3  				Workmen spread a ‘tack coat’ of asphalt on the old pavement. 1954    Gloss. Highway Engin. Terms 		(B.S.I.)	 28  				Tack coat, a coat of liquid (such as bitumen, road tar, or an emulsion thereof) applied as a thin film to a surface to improve the adhesion of a course laid thereon. 1979    Civil Engin. Nov. 27/1  				The painting on of a grid of levels on the tack coat by engineers. < as lemmas | 
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