| 单词 | extension ladder |
| 释义 | extension ladder (once / 492472 pages) n WORD FAMILY extension ladder: extension ladders USAGE EXAMPLESHe was trying to get an extension ladder from the shaft when he fell more than 20 feet. Washington Times(Aug 27, 2016) Crews using an extension ladder helped get fire department personnel close to the man, who had contacted his co-workers to report that he felt ill. Washington Times(Aug 09, 2016) When using an extension ladder, the bottom of the ladder should be one foot away from the wall for every four feet of height. US News(Oct 09, 2015) n a ladder whose length can be extended Hypo|Hyper aerial ladder mechanically extendible ladder; used on a fire truck ladder steps consisting of two parallel members connected by rungs; for climbing up or down |
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