| 单词 | Gray clay treating | 
| 释义 | Gray clay treating [`grā `klā ´trēd·iŋ]  CHEMICAL ENGINEERING A fixed-bed, vapor-phase treating process used to polymerize selectively unsaturated gum-forming constituents (diolefins); a fixed bed is used of 30- to 60-mesh fuller's earth.  | 
	
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