| 单词 | directing-circle |
| 释义 | > as lemmasdirecting-circle directing-circle n. a circle made of two hoops, one within the other, to guide sappers in the making of gabions. ΚΠ 1834 J. S. Macaulay Treat. Field Fortification 62 The directing circle is then laid on a level piece of ground, and seven, eight, or nine pickets are driven at equal distances apart, between the hoops. < as lemmas |
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