| 单词 | Houdry hydrocracking | 
| 释义 | Houdry hydrocracking [`hü·drē ¦hī·drō¦krak·iŋ]  CHEMICAL ENGINEERING A catalytic process combining cracking and desulfurization of crude petroleum oil in the presence of hydrogen; catalysts may be nickel oxide or nickel sulfide on silica alumina, and cobalt molybdate on alumina.  | 
	
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