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| 单词 | tractor screw |
| 释义 | > as lemmastractor screw tractor screw n. ΚΠ 1910 C. C. Turner Aerial Navigation viii. 127 In many monoplanes a single screw in front is used. It pulls the machine, and is often called a ‘tractor’ screw. 1913 Captain Sept. 1069/2 More biplanes than formerly use tractor screws in front, instead of propellers behind the main planes. < as lemmas |
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