| 单词 | Portland screw |
| 释义 | Definition of Portland screw in English:Portland screwnoun
OriginLate 19th century; earliest use found in Charles Lyell (1797–1875), geologist. Definition of Portland screw in US English:Portland screwnoun
OriginLate 19th century; earliest use found in Charles Lyell (1797–1875), geologist. |
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