| 单词 | portal frame |
| 释义 | portal framenouncivil engineering building trades a frame, usually of steel, consisting of two uprights and a cross beam at the top: the simplest structural unit in a framed building or a doorway Words nearby portal framePort Alberni, portal canal, portal circulation, portal cirrhosis, portal fissure, portal frame, portal hypertension, portal lobule of liver, portal system, portal-systemic encephalopathy, portal-to-portal Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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