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单词 fast line
释义

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fast line
fast line n. Surveying Obsolete rare a line whose position has been accurately determined through measurement; cf. survey line n. a.
ΚΠ
1796 J. Rodham in C. Hutton Math. & Philos. Dict. II. 550/1 When a line is measured whose position is determined..it is called a fast line.
1816 A. Nesbit Treat. Pract. Mensuration iii. 126 Measuring lines in the most convenient manner; some of which must be run from the first to the third, or from the second to the fourth line, or in some more proper direction, so that they may become proofs, and fast lines.
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