rise-and-fall
adjective
That rises and falls, or can be made to rise or fall; (Engineering ) designating machine parts that can be raised or lowered during use, and equipment incorporating such parts.
Origin
Late 19th century.
| 单词 | rise-and-fall |
| 释义 | rise-and-falladjective That rises and falls, or can be made to rise or fall; (Engineering ) designating machine parts that can be raised or lowered during use, and equipment incorporating such parts. Origin |
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